fixes #5132 hang when provisioning on ovirt 3.4

(cherry picked from commit 578e6f54462e785d6ae25cceb6fbdd6c21696cb8)

Conflicts:
	app/models/concerns/fog_extensions/ovirt/server.rb
fixes #4639 - array in lookup_value incorrectly displayed in form

(cherry picked from commit 801a90d196d363aadae7bf2be9347ff6e46e0471)
fixes #5609 - backport bugfix in hosts form when location is nil

This commit fixes a bug that has been fixed in
acfbc45886c4d81a2a3ca5af433a6124a0a7191a