Adding new registry_port option (#5779)

New override are added to allow installation of the registry
on different ports than ``5000``. The default port is unchanged
from previous versions

roles/kubernetes-apps/registry/templates/registry-proxy-psp.yml.j2

@@ -36,8 +36,8 @@ spec:
     - 'persistentVolumeClaim'
   hostNetwork: true
   hostPorts:
-  - min: 5000
-    max: 5000
+  - min: {{ registry_port }}
+    max: {{ registry_port }}
   hostIPC: false
   hostPID: false
   runAsUser: