Add post_upgrade_task and remove puppet-ceph pkg

This change adds a post_upgrade used to remove the
puppet-ceph package which is no longer required.
No ceph components depend on it, so it should be
removed from the system.

Change-Id: I9cd63ee34dfd964f18a33043980703660b0a55d7

deployment/ceph-ansible/ceph-base.yaml

@@ -540,7 +540,6 @@ outputs:
     value:
       service_name: ceph_base
       upgrade_tasks: []
-      post_upgrade_tasks: []
       puppet_config:
         config_image: ''
         config_volume: ''
@@ -692,3 +691,10 @@ outputs:
             - name: set ceph_ansible_playbooks_default
               set_fact:
                 ceph_ansible_playbooks_default: ["/usr/share/ceph-ansible/infrastructure-playbooks/rolling_update.yml"]
+      post_upgrade_tasks:
+        - name: Clean puppet-ceph package
+          when:
+            - (step | int) == 3
+          package:
+            name: puppet-ceph
+            state: absent