Fix for regions test
Fix for regions test

Google added new DC and current test returns Failure:

TestRegions#test_all [/Users/martinlazarov/projects/fog-google/test/integration/compute/test_regions.rb:11]:
Expected: 3
  Actual: 4

This pull request will fix it.
Temikus/fog-google,fog/fog-google,mbrukman/fog-google,plribeiro3000/fog-google,ihmccreery/fog-google,Temikus/fog-google