Tests: Fix zfssa TestRestClientURL.test_request
Tests: Fix zfssa TestRestClientURL.test_request

This test can currently fail with mismatched parameters
to urlopen.  Just ensure that urlopen is called so
that this works across all environments/versions.

Closes-Bug: #1486245

Change-Id: Icec5d208a979ba62b9dfef2b499a00bacec841d3

tlakshman26/cinder-new-branch,NetApp/cinder,bswartz/cinder,takeshineshiro/cinder,openstack/cinder,potsmaster/cinder,eharney/cinder,nexusriot/cinder,apporc/cinder,bswartz/cinder,nexusriot/cinder,openstack/cinder,eharney/cinder,j-griffith/cinder,Datera/cinder,tlakshman26/cinder-new-branch,scality/cinder,nikesh-mahalka/cinder,Paul-Ezell/cinder-1,mahak/cinder,phenoxim/cinder,ge0rgi/cinder,sasukeh/cinder,cloudbase/cinder,dims/cinder,potsmaster/cinder,Paul-Ezell/cinder-1,winndows/cinder,manojhirway/ExistingImagesOnNFS,manojhirway/ExistingImagesOnNFS,tlakshman26/cinder-bug-fix-volume-conversion-full,NetApp/cinder,dims/cinder,sasukeh/cinder,scality/cinder,scottdangelo/RemoveVolumeMangerLocks,cloudbase/cinder,phenoxim/cinder,Nexenta/cinder,leilihh/cinder,takeshineshiro/cinder,Hybrid-Cloud/cinder,duhzecca/cinder,j-griffith/cinder,tlakshman26/cinder-bug-fix-volume-conversion-full,leilihh/cinder,apporc/cinder,Datera/cinder,winndows/cinder,nikesh-mahalka/cinder,scottdangelo/RemoveVolumeMangerLocks,Hybrid-Cloud/cinder,Nexenta/cinder,duhzecca/cinder,mahak/cinder