Make CLAMP compatible with Kubernetes v1.17

Issue-ID: OOM-2449
Signed-off-by: Magdalena Biernacka <magdalena.1.biernacka@nokia.com>
Change-Id: I75090aac67139465bb5f4030129361ea771c11d2
diff --git a/kubernetes/clamp/charts/mariadb/templates/deployment.yaml b/kubernetes/clamp/charts/mariadb/templates/deployment.yaml
index b6af4e3..7d6e162 100644
--- a/kubernetes/clamp/charts/mariadb/templates/deployment.yaml
+++ b/kubernetes/clamp/charts/mariadb/templates/deployment.yaml
@@ -13,7 +13,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-apiVersion: extensions/v1beta1
+apiVersion: apps/v1
 kind: Deployment
 metadata:
   name: {{ include "common.fullname" . }}
@@ -25,6 +25,9 @@
     heritage: {{ .Release.Service }}
 spec:
   replicas: {{ .Values.replicaCount }}
+  selector:
+    matchLabels:
+      app: {{ include "common.name" . }}
   template:
     metadata:
       labels: