Change groupId to prepare for upload to Central

It's much easier to get your package verified on Central if it uses
a GitHub groupId. Otherwise you need to use DNS verification! This
changes the groupId:

- from: org.cgiar.cgspace.ctask
- to: io.github.ilri.cgspace

Also the package changed as well.

See: https://central.sonatype.org/pages/producers.html

src/main/resources/io/github/ilri/cgspace/ctasks/cgspace-countries.json

@@ -0,0 +1,73 @@
+{
+  "countries": [
+    {
+      "alpha_2": "ZR",
+      "alpha_3": "ZAR",
+      "alpha_4": "ZRCD",
+      "name": "Zaire, Republic of",
+      "cgspace_name": "Zaire",
+      "numeric": "180",
+      "withdrawal_date": "1997-07-14"
+    },
+    {
+      "alpha_2": "PS",
+      "alpha_3": "PSE",
+      "name": "Palestine State of",
+      "cgspace_name": "Palestine, State of",
+      "numeric": "275",
+      "official_name": "the State of Palestine"
+    },
+    {
+      "alpha_2": "CD",
+      "alpha_3": "COD",
+      "cgspace_name": "Congo, Democratic Republic of",
+      "name": "Congo, The Democratic Republic of the",
+      "numeric": "180"
+    },
+    {
+      "alpha_2": "IR",
+      "alpha_3": "IRN",
+      "name": "Iran, Islamic Republic of",
+      "cgspace_name": "Iran",
+      "numeric": "364",
+      "official_name": "Islamic Republic of Iran"
+    },
+    {
+      "alpha_2": "KP",
+      "alpha_3": "PRK",
+      "name": "Korea, Democratic People's Republic of",
+      "cgspace_name": "Korea, DPR",
+      "numeric": "408",
+      "official_name": "Democratic People's Republic of Korea"
+    },
+    {
+      "alpha_2": "LA",
+      "alpha_3": "LAO",
+      "name": "Lao People's Democratic Republic",
+      "cgspace_name": "Laos",
+      "numeric": "418"
+    },
+    {
+      "alpha_2": "FM",
+      "alpha_3": "FSM",
+      "name": "Micronesia, Federated States of",
+      "cgspace_name": "Micronesia",
+      "numeric": "583",
+      "official_name": "Federated States of Micronesia"
+    },
+    {
+      "alpha_2": "RU",
+      "alpha_3": "RUS",
+      "name": "Russian Federation",
+      "cgspace_name": "Russia",
+      "numeric": "643"
+    },
+    {
+      "alpha_2": "SY",
+      "alpha_3": "SYR",
+      "name": "Syrian Arab Republic",
+      "cgspace_name": "Syria",
+      "numeric": "760"
+    }
+  ]
+}