[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/postgres/templates/_deployment.tpl b/kubernetes/common/postgres/templates/_deployment.tpl
index 7d04501..d93d401 100644
--- a/kubernetes/common/postgres/templates/_deployment.tpl
+++ b/kubernetes/common/postgres/templates/_deployment.tpl
@@ -42,6 +42,8 @@
         release: {{ include "common.release" $dot }}
         name: "{{ index $dot.Values "container" "name" $pgMode }}"
     spec:
+      imagePullSecrets:
+      - name: "{{ include "common.namespace" $dot }}-docker-registry-key"
       initContainers:
       - command:
         - sh