Ignore docker-registry release when fetching cf/diego release info
Ignore docker-registry release when fetching cf/diego release info

Signed-off-by: Matthew Sykes <fb2dd171fe47bac8d5b55d1d785c243b0892e206@gmail.com>

cloudfoundry-incubator/diego-release,cloudfoundry-incubator/diego-release,cloudfoundry-incubator/diego-release,cloudfoundry-incubator/diego-release