This reverts commit 42de44592f. It appears
there might be thread-safety issues as panics have started occuring when
parallism is ramped up. Reverting for now while investigating.
* Make google_compute_global_address a versioned resource with Beta support.
* Added Beta support for ip_version in google_compute_global_address.
* Move checks to TestCheckFuncs, add a regression test for IPV4 on v1 resources.
* Consolidated TestCheckFuncs to a single function.
* Add missing return statement.
* Fix IPV4 test
* Clarified comment.