Rework pipenv

Ansible 2.5.0 currently has problems with Jinja2 expressions and vaults
so I decided to use Ansible from a source checkout of the devel branch.

I removed the old Pipfile and re-created it with Python 2 and satisfied
the dependencies from requirements.txt, then sourced Ansible:

  $ rm Pipfile*
  $ pipenv install --two -r ~/src/git/ansible/requirements.txt
  $ pipenv shell
  $ source ~/src/git/ansible/hacking/env-setup

Pipfile

@@ -4,12 +4,12 @@ verify_ssl = true
 name = "pypi"
 
 [packages]
-ansible = "*"
+"Jinja2" = "*"
-ansible-lint = "*"
+PyYAML = "*"
-pip = "*"
+paramiko = "*"
-setuptools = "*"
+cryptography = "*"
 
 [dev-packages]
 
 [requires]
-python_version = "3.6"
+python_version = "2.7"

Pipfile.lock

@@ -1,11 +1,11 @@
 {
     "_meta": {
         "hash": {
-            "sha256": "cdb8c917e72c221bc8b6cca33602c7be0bf5df37e6f6f061bd8f32c9daf7863c"
+            "sha256": "b39e0bcde1141bf585ecc0d339d16b3a3ffb23f6acf0cd6e1ced5340ad2865e4"
         },
         "pipfile-spec": 6,
         "requires": {
-            "python_version": "3.6"
+            "python_version": "2.7"
         },
         "sources": [
             {
@@ -16,21 +16,6 @@
         ]
     },
     "default": {
-        "ansible": {
-            "hashes": [
-                "sha256:714ede4b0f5455eb2dd2536d8cabb42ab439f52b5ac902308ad027b46f68e6dc",
-                "sha256:74bb063322372fc9e2a84bbe562ab5d1b45a2fba3ec609c03d824758e6dd9c38"
-            ],
-            "index": "pypi",
-            "version": "==2.5.0"
-        },
-        "ansible-lint": {
-            "hashes": [
-                "sha256:fd86229fe6315137537d5380a13512e0cefa169d740a5a9e1f60dbd9ef6d6704"
-            ],
-            "index": "pypi",
-            "version": "==3.4.21"
-        },
         "asn1crypto": {
             "hashes": [
                 "sha256:2f1adbb7546ed199e3c90ef23ec95c5cf3585bac7d11fb7eb562a3fe89c64e87",
@@ -106,25 +91,36 @@
         },
         "cryptography": {
             "hashes": [
-                "sha256:0f61273eccc681dc5a77dcd517cc2cb74078d1b00adb2b273d0a010153ae43c7",
+                "sha256:3f3b65d5a16e6b52fba63dc860b62ca9832f51f1a2ae5083c78b6840275f12dd",
-                "sha256:27dd18e180608c512433c843ad2d62396399608a0f3603c4d805500caeeec3d6",
+                "sha256:551a3abfe0c8c6833df4192a63371aa2ff43afd8f570ed345d31f251d78e7e04",
-                "sha256:2893ee1d67dace6178732c9ea8c176fedf5b6a6463f72f1378b779cdba8a0ea5",
+                "sha256:5cb990056b7cadcca26813311187ad751ea644712022a3976443691168781b6f",
-                "sha256:2c5265c622e02af289bdc5e96c0a572bffa2fc2ac3f86fac3bace632ab25888c",
+                "sha256:60bda7f12ecb828358be53095fc9c6edda7de8f1ef571f96c00b2363643fa3cd",
-                "sha256:34a433c3783946106236c25a89e0c271a3bb1a8e8cd8f12782e8bf8bec4e351e",
+                "sha256:6fef51ec447fe9f8351894024e94736862900d3a9aa2961528e602eb65c92bdb",
-                "sha256:39532ae44154ce88eec25d2a361e9c285b2477e0a4b4fc61fb9d4bcb3804dec6",
+                "sha256:77d0ad229d47a6e0272d00f6bf8ac06ce14715a9fd02c9a97f5a2869aab3ccb2",
-                "sha256:469a72fda257b2179bb43e431b822d8087da53b40e68813bcfa54a16c3ebcdfe",
+                "sha256:808fe471b1a6b777f026f7dc7bd9a4959da4bfab64972f2bbe91e22527c1c037",
-                "sha256:54029ce210d3013dccced6478f4dfb25e7a409e13086f714be9c14489c64e2c7",
+                "sha256:9b62fb4d18529c84b961efd9187fecbb48e89aa1a0f9f4161c61b7fc42a101bd",
-                "sha256:54776f1e2ffd957571b79738fb41d8df69a93edb6d148ca149494d73975e8cab",
+                "sha256:9e5bed45ec6b4f828866ac6a6bedf08388ffcfa68abe9e94b34bb40977aba531",
-                "sha256:84642ad31dccf9969b2613fa532ff5e871e9ee592ab0244dc9f6724e56591b8b",
+                "sha256:9fc295bf69130a342e7a19a39d7bbeb15c0bcaabc7382ec33ef3b2b7d18d2f63",
-                "sha256:8ce363eed7ccc70f53be6ea4200aa20bbff99c8cbfce21a904f98e76c2bf5887",
+                "sha256:abd070b5849ed64e6d349199bef955ee0ad99aefbad792f0c587f8effa681a5e",
-                "sha256:95b7822c8bf203bafb95527eaf8995d9dd4eef1b6899631f9293aa6926dab1d9",
+                "sha256:ba6a774749b6e510cffc2fb98535f717e0e5fd91c7c99a61d223293df79ab351",
-                "sha256:9f2d66952fc55f13f9c62ea6ae6ff88c2f9c2c21533065e1f7bddf0cf33c4cb9",
+                "sha256:c332118647f084c983c6a3e1dba0f3bcb051f69d12baccac68db8d62d177eb8a",
-                "sha256:c27ed8b01d5feeff8479384ed782bad1e5071563f47194703f0dc20c1b558503",
+                "sha256:d6f46e862ee36df81e6342c2177ba84e70f722d9dc9c6c394f9f1f434c4a5563",
-                "sha256:cf1069fda0c8e1d2bbef2cf0de0be797860c8a34d1df3a24f1180045fc06974f",
+                "sha256:db6013746f73bf8edd9c3d1d3f94db635b9422f503db3fc5ef105233d4c011ab",
-                "sha256:dddad9d322a3f0867009ff9f25477b8f7c0bdbedf143704b384c9472f11cb2d3",
+                "sha256:f57008eaff597c69cf692c3518f6d4800f0309253bb138b526a37fe9ef0c7471",
-                "sha256:e42b290eb7804d82c6d614b55e3b726dee464099a0e6240175f8d7b682b9295d"
+                "sha256:f6c821ac253c19f2ad4c8691633ae1d1a17f120d5b01ea1d256d7b602bc59887"
             ],
-            "version": "==2.2.1"
+            "index": "pypi",
+            "version": "==2.2.2"
+        },
+        "enum34": {
+            "hashes": [
+                "sha256:2d81cbbe0e73112bdfe6ef8576f2238f2ba27dd0d55752a776c41d38b7da2850",
+                "sha256:644837f692e5f550741432dd3f223bbb9852018674981b1664e5dc339387588a",
+                "sha256:6bd0f6ad48ec2aa117d3d141940d484deccda84d4fcd884f5c3d93c23ecd8c79",
+                "sha256:8ad8c4783bf61ded74527bffb48ed9b54166685e4230386a9ed9b1279e2df5b1"
+            ],
+            "markers": "python_version < '3'",
+            "version": "==1.1.6"
         },
         "idna": {
             "hashes": [
@@ -133,11 +129,19 @@
             ],
             "version": "==2.6"
         },
+        "ipaddress": {
+            "hashes": [
+                "sha256:200d8686011d470b5e4de207d803445deee427455cd0cb7c982b68cf82524f81"
+            ],
+            "markers": "python_version < '3'",
+            "version": "==1.0.19"
+        },
         "jinja2": {
             "hashes": [
                 "sha256:74c935a1b8bb9a3947c50a54766a969d4846290e1e788ea44c1392163723c3bd",
                 "sha256:f84be1bb0040caca4cea721fcbbbbd61f9be9464ca236387158b0feea01914a4"
             ],
+            "index": "pypi",
             "version": "==2.10"
         },
         "markupsafe": {
@@ -151,6 +155,7 @@
                 "sha256:24fb31c947de85fbdeca09e222d41206781581fb0bdf118d2ef18f6e414cd388",
                 "sha256:33e36775a6c71790ba7692a73f948b329cf9295a72b0102144b031114bd2a4f3"
             ],
+            "index": "pypi",
             "version": "==2.4.1"
         },
         "pyasn1": {
@@ -221,6 +226,7 @@
                 "sha256:ca233c64c6e40eaa6c66ef97058cdc80e8d0157a443655baa1b2966e812807ca",
                 "sha256:e863072cdf4c72eebf179342c94e6989c67185842d9997960b3e69290b2fa269"
             ],
+            "index": "pypi",
             "version": "==3.12"
         },
         "six": {