Bump gcp to 0.5.1-google_gpii.0.
Bump gcp to 0.5.1-google_gpii.0.

mrtyler/gpii-terraform,mrtyler/gpii-infra,mrtyler/gpii-infra,mrtyler/gpii-infra,mrtyler/gpii-infra,mrtyler/gpii-terraform,mrtyler/gpii-terraform