remove the deb-src as it's optional

playbooks/roles/mysql/tasks/mysql.yml

@@ -7,11 +7,8 @@
 
 - name: Install MySQL community apt repositories
   apt_repository:
-    repo: "{{ item }}"
+    repo: "deb http://repo.mysql.com/apt/ubuntu/ precise mysql-5.6"
     update_cache: yes
-  with_items:
-    - "deb http://repo.mysql.com/apt/ubuntu/ precise mysql-5.6"
-    - "deb-src http://repo.mysql.com/apt/ubuntu/ precise mysql-5.6"
 
 - name: Install mysql-5.6 and dependencies
   apt: