oc diagnostics throws "docker-registry" and "ImageStream registry" do not match error

Issue

• oc diagnostics throws docker-registry and ImageStream registry do not match error
• The complete error message is:

ERROR: [node1 from diagnostic ClusterRegistry@openshift/origin/pkg/diagnostics/cluster/registry.go:343]
       Diagnostics created a test ImageStream and compared the registry IP
       it received to the registry IP available via the docker-registry service.

       docker-registry      : 172.30.12.15:5000
       ImageStream registry : docker-registry.default.svc:5000

       They do not match, which probably means that an administrator re-created
       the docker-registry service but the master has cached the old service
       IP address. Builds or deployments that use ImageStreams with the wrong
       docker-registry IP will fail under this condition.

       To resolve this issue, restarting the master (to clear the cache) should
       be sufficient. Existing ImageStreams may need to be re-created.