GCE region selection will be removed from ManageIQ

[lkhomenk]

With https://bugzilla.redhat.com/show_bug.cgi?id=1433062 - GCE region selection will be removed as no ManageIQ functionality is binded to the GCE region.
This will cause failure of all wrapanapi region based operations.
e.g. - rest auto_placement provision can place VM into any region - https://bugzilla.redhat.com/show_bug.cgi?id=1544547

[lkhomenk]

@mshriver just notifiyng

[lkhomenk]

it leads to such failures:

`>       raise HttpError(resp, content, uri=self.uri)
E       HttpError: <HttpError 404 when requesting https://www.googleapis.com/compute/v1/projects/red-hat-cloudforms-support/zones/us-central1-a/instances/test-prov-lqiy?alt=json returned "The resource 'projects/red-hat-cloudforms-support/zones/us-central1-a/instances/test-prov-lqiy' was not found">

/usr/lib/python2.7/site-packages/googleapiclient/http.py:840: HttpError
HttpError`