Move installation of 'patch' package into the actual role

.gitlab-ci.yml

@@ -1,9 +1,5 @@
 image: williamyeh/ansible:debian8
 
-before_script:
-    - apt-get update
-    - apt-get -y install patch
-
 variables:
     HOSTNAME: default.example.org
 

roles/ispmail-packages/tasks/main.yml

@@ -14,6 +14,7 @@
   - spamass-milter
   - spamassassin
   - pwgen
+  - patch
 - name: purge Exim installation
   apt: name={{item}} state=absent purge=yes
   with_items: