Minor changes

defaults/main.yml

@@ -136,4 +136,4 @@ percona_repository: 'http://repo.percona.com/apt'
 # Galera
 mysql_galera_bootstrap: false
 mariadb_galera_members: []
-mysql_galera_primary_node: null
+mysql_galera_primary_node: 'change_me' # See: https://github.com/ansible/ansible/issues/17453

tasks/install/main.yml

@@ -32,8 +32,6 @@
   with_items:
     - mytop
     - percona-toolkit
+    - percona-xtrabackup
     - python-mysqldb
     - mysqltuner
-
-- name: APT | Install Percona Xtrabackup
-  apt: pkg=percona-xtrabackup state=present