Merge pull request #658 from chancez/update_metering_install_modes

Update metering InstallModes to support SingleNamespace

Author: ecordell

deploy/chart/catalog_resources/rh-operators/metering-operator.v0.12.0.clusterserviceversion.yaml

@@ -28,7 +28,7 @@ spec:
   - type: OwnNamespace
     supported: true
   - type: SingleNamespace
-    supported: false
+    supported: true
   - type: MultiNamespace
     supported: false
   - type: AllNamespaces