Bumping versions to 1.0.0-rc3, 0.16.0-beta, 0.16.0-alpha for release (#1987)
Bumping versions to 1.0.0-rc3, 0.16.0-beta, 0.16.0-alpha for release (#1987)


googleapis/google-cloud-java,googleapis/google-cloud-java,googleapis/google-cloud-java