[COMMON] Added imagePullSecrets to common template files with some fix

Added the missing definition for imagePullSecrets in the
  statefulsets.yaml
  deployment.yaml
to support the registryGenerator

Issue-ID: OOM-2789
Signed-off-by: andreas-geissler <andreas-geissler@telekom.de>
Change-Id: I013ba52c9c49f95cd3d53fcaa9eb084adcbfe662
diff --git a/kubernetes/common/music/components/music-cassandra/templates/statefulset.yaml b/kubernetes/common/music/components/music-cassandra/templates/statefulset.yaml
index 1aabfb6..d80e70b 100644
--- a/kubernetes/common/music/components/music-cassandra/templates/statefulset.yaml
+++ b/kubernetes/common/music/components/music-cassandra/templates/statefulset.yaml
@@ -41,6 +41,8 @@
         release: {{ include "common.release" . }}
       name: {{ include "common.name" . }}
     spec:
+      imagePullSecrets:
+      - name: "{{ include "common.namespace" . }}-docker-registry-key"
       containers:
       - name: {{ include "common.name" . }}
         image: {{ include "repositoryGenerator.repository" . }}/{{ .Values.image }}