Introduce variables for apt key-server and -id

defaults/main.yml

@@ -127,6 +127,8 @@ mysql_users: []
 mysql_mariadb_version: '10.1'
 # See: https://downloads.mariadb.org/mariadb/repositories
 mysql_mariadb_repository: "http://ftp.igh.cnrs.fr/pub/mariadb/repo/{{ mysql_mariadb_version }}/debian"
+mysql_mariadb_key_server: "keyserver.ubuntu.com"
+mysql_mariadb_key_id: '0xcbcb082a1bb943db'
 
 # -------------------------------------
 # Percona

tasks/install/mariadb/upstream.yml

@@ -1,7 +1,7 @@
 ---
 
 - name: APT | Install MariaDB key
-  apt_key: keyserver="keyserver.ubuntu.com" id="0xcbcb082a1bb943db" state=present
+  apt_key: keyserver="{{ mysql_mariadb_key_server }}" id="{{ mysql_mariadb_key_id }}" state=present
 
 - name: APT | Add MariaDB repository
   apt_repository: repo='deb {{ mysql_mariadb_repository }} {{ ansible_distribution_release }} main' state=present
@@ -12,4 +12,3 @@
 
 - name: INCLUDE | Normal Install
   include: default.yml
-