Add "get" Privileges to Deployer Role

The pgo-deployer-cr ClusterRole has now been assigned additional "get"
privileges as required to determine whether or not certain resources
already exist prior to attempting to create them.

Author: andrewlecuyer

installers/kubectl/postgres-operator.yml

@@ -38,16 +38,17 @@ rules:
     resources:
       - configmaps
       - services
-      - serviceaccounts
       - persistentvolumeclaims
     verbs:
+      - get
       - create
       - delete
   - apiGroups:
       - ''
     resources:
       - serviceaccounts
     verbs:
+      - get
       - create
       - delete
       - patch
@@ -77,6 +78,7 @@ rules:
       - roles
       - rolebindings
     verbs:
+      - get
       - create
       - delete
       - bind