Remove ceph repos from deploy-env role

Also do not install ceph-common package on the
test nodes.

Change-Id: Ia33f2e7f26f3ccaec4863a22702946b4383d39a5

roles/deploy-env/tasks/prerequisites.yaml

@@ -11,17 +11,6 @@
 # limitations under the License.
 
 ---
-- name: Add Ceph apt repository key
-  apt_key:
-    url: https://download.ceph.com/keys/release.asc
-    state: present
-
-- name: Add Ceph apt repository
-  apt_repository:
-    repo: deb https://download.ceph.com/debian-squid/ "{{ ansible_distribution_release }}" main
-    state: present
-    filename: ceph
-
 - name: Add Kubernetes apt repository key
   apt_key:
     url: "https://pkgs.k8s.io/core:/stable:/{{ kube_version_repo }}/deb/Release.key"
@@ -40,7 +29,6 @@
       - bc
       - bridge-utils
       - ca-certificates
-      - ceph-common
       - conntrack
       - curl
       - ethtool