Fix ceph-ansible permissions when checking the repo name

The purpose of this fix is to address a bug hit during
upgrades: in order to run yum info the current user should
be able to download metadata for repositories and a privileges
escalation is required by pkg manager.

Change-Id: I248fc36ab3b1f4a81a6884b18fba5fcc0cff08ea

roles/ceph/tasks/ceph-ansible-installed.yaml

@@ -23,6 +23,7 @@
 
 - name: Get ceph-ansible repository
   shell: "yum info ceph-ansible | awk '/From repo/ {print $4}'"
+  become: true
   register: repo
   changed_when: false