Automatic merge from submit-queue (batch tested with PRs 46299, 46309, 46311, 46303, 46150)

Move docker validation test to separate project.

Docker validation test is leaking VMs because new docker version `DOCKER_VERSION=17.05.0-c` totally breaks the new gci image `GCE_IMAGES=gci-test-60-9579-0-0` with the `gci-docker-version` metadata specified.

The test successfully created the instance, but timed out when checking VM aliveness, and leaked the VM.

I've cleaned up all leaked VMs. This PR moves docker validation node e2e test into a separate project to not influencing other node e2e test.

@kewu1992 We should fix the docker automated validation test.

/cc @dchen1107 @yujuhong @abgworrall