Change module apt with multiple packages to remove deprecated syntax

tasks/main.yml

@@ -9,11 +9,12 @@
 
   - name: "Install MemCache"
     apt:
-      pkg='{{item}}'
+      pkg='{{ packages }}'
       state='present'
       update_cache=yes
-    with_items:
-      - php{{ (php_version|default('5.5') == '5.3') | ternary('5','') }}-memcached
-      - memcached
+    vars:
+      packages:
+        - php{{ (php_version|default('5.5') == '5.3') | ternary('5','') }}-memcached
+        - memcached
 
   when: '"memcache" not in excluded_roles'