* providers/google: Add google_compute_image resource
This change introduces the google_compute_image resource, which allows
Terraform users to create a bootable VM image from a raw disk tarball
stored in Google Cloud Storage. The google_compute_image resource
may be referenced as a boot image for a google_compute_instance.
* providers/google: Support family property in google_compute_image
* provider/google: Idiomatic checking for presence of config val
* vendor: Update Google client libraries
* Remove `make updatedeps` from Travis build. We'll follow up with more
specific plans around dependency updating in subsequent PRs.
* Update all `make` targets to set `GO15VENDOREXPERIMENT=1` and to
filter out `/vendor/` from `./...` where appropriate.
* Temporarily remove `vet` from the `make test` target until we can
figure out how to get it to not vet `vendor/`. (Initial
experimentation failed to yield the proper incantation.)
Everything is pinned to current master, with the exception of:
* Azure/azure-sdk-for-go which is pinned before the breaking change today
* aws/aws-sdk-go which is pinned to the most recent tag
The documentation still needs to be updated, which we can do in a follow
up PR. The goal here is to unblock release.
Christoph Tavan