Import tests for compute_instance_template fail without this change as
they expect a value of true for automatic_restart. As this value was
removed, we're no longer setting it (and therefore it looks like it has
a value of false, which is different from the default).
* Fix bug where scheduling.automatic_restart false is never used
* Remove deprecated automatic_restart value in favor of scheduling.automatic_restart
* Remove deprecated on_host_maintenance
* Correct bad var name
* Re-add removed schema values and marked as Removed
* Fix var to snake case
* Migrate empty scheduling blocks in compute_instance_template
* Shorten error message
* Use only one return value instead of two
* Used standard validation functions where possible, added a GCP name validation function.
* Add tests for GCP name, factor out a ValidateRegexp function.
* make fmt
