roles/mariadb: Only create users on 127.0.0.1 and ::1

A few months ago I disabled hostname lookups so only IP addresses
work now anyways.

roles/common/tasks/tarsnap.yml

@@ -5,7 +5,7 @@
   when: ansible_architecture != 'armv7l'
 
 - name: Add GPG key for Tarsnap
-  apt_key: id=0xFC72A10BF6B692AA url=https://pkg.tarsnap.com/tarsnap-deb-packaging-key.asc state=present
+  apt_key: id=0xBF75EEAB040E447C url=https://pkg.tarsnap.com/tarsnap-deb-packaging-key.asc state=present
   register: add_tarsnap_apt_key
 
 - name: Update apt cache

roles/mariadb/tasks/main.yml

@@ -34,10 +34,8 @@
 - name: Update MariaDB root password for all root accounts
   mysql_user: name=root host={{ item }} password={{ mariadb_root_password }} login_unix_socket={{ mariadb_login_unix_socket }}
   loop:
-    - "{{ inventory_hostname }}"
     - 127.0.0.1
     - ::1
-    - localhost
   tags: mariadb
 
 - name: Create .my.conf file with root credentials