[APPC] Don't hardcode mariadb root password

You should never ever assume that secretpassword is a production
ready password for your mariadb-galera instance. Instead let's
just share a secret with our instance of mariadb-galera.

Issue-ID: OOM-2275
Change-Id: I25486ad81a2ec428dbbd379ab3529c84f55acc4b
Signed-off-by: Krzysztof Opasiak <k.opasiak@samsung.com>
diff --git a/kubernetes/appc/templates/statefulset.yaml b/kubernetes/appc/templates/statefulset.yaml
index 9a62426..5ed2970 100644
--- a/kubernetes/appc/templates/statefulset.yaml
+++ b/kubernetes/appc/templates/statefulset.yaml
@@ -69,10 +69,7 @@
             periodSeconds: {{ .Values.readiness.periodSeconds }}
           env:
             - name: MYSQL_ROOT_PASSWORD
-              valueFrom:
-                secretKeyRef:
-                  name: {{ template "common.fullname" . }}
-                  key: db-root-password
+              {{- include "common.secret.envFromSecret" (dict "global" . "uid" "db-root-pass" "key" "password") | indent 14}}
             - name: SDNC_CONFIG_DIR
               value: "{{ .Values.config.configDir }}"
             - name: APPC_CONFIG_DIR