[COMMON] Adding Common Template for cassa-operator

- K8ssandraCluster resources template file added
- Modification of the cassandra chart to add the option to install
  cassandra using the k8ssandra-operator
- AAI and SDC values changed to support the new cassandra settings
- Fix for SDC cql version in jobs
- for London make k8ssandra-operator optional (default: false)

Issue-ID: OOM-3168
Signed-off-by: Dasarathi, Swain (ds00528024) <ds00528024@techmahindra.com>
Change-Id: Idfe232460c9c1f584536e60ea042345d7dca3164
diff --git a/kubernetes/common/cassandra/templates/service.yaml b/kubernetes/common/cassandra/templates/service.yaml
index 8934d41..092c677 100644
--- a/kubernetes/common/cassandra/templates/service.yaml
+++ b/kubernetes/common/cassandra/templates/service.yaml
@@ -14,4 +14,6 @@
 # limitations under the License.
 */}}
 
+{{- if not .Values.k8ssandraOperator.enabled }}
 {{ include "common.headlessService" . }}
+{{- end }}
\ No newline at end of file