Fix MariaDB apt package pinning

The variables in vars are only loaded when the include_vars
task is run, which is after meta-dependencies are processed.

This patch ensures that the pinning is properly applied when
the meta-dependent role is executed.

Closes-Bug: #1712315
Change-Id: Ib99afee1a3bf9fba8d34c63ffa28e5fa41b73d03

defaults/main.yml

@@ -26,6 +26,9 @@ galera_client_repo: "{{ _galera_client_repo }}"
 # Set the gpg keys needed to be imported
 galera_client_gpg_keys: "{{ _galera_client_gpg_keys | default([]) }}"
 
+# This is only applied if the ansible_pkg_mgr is 'apt'
+galera_server_distro_package_pins: [{ package: "*", release: MariaDB, priority: "1001" }]
+
 ## APT Cache Options
 cache_timeout: 600
 

vars/ubuntu-16.04.yml

@@ -41,4 +41,3 @@ _galera_client_gpg_keys:
     fallback_keyserver: 'hkp://p80.pool.sks-keyservers.net:80'
     hash_id: '0xF1656F24C74CD1D8'
 
-galera_client_package_pins: [{ package: "*", release: MariaDB, priority: "1001" }]