Don't require OpenSSL for unit tests
Don't require OpenSSL for unit tests

This allows unit tests to run w/o PyOpenSSL installed.

Closes-Bug: #1490668

Change-Id: I820875ca66d23327218cc5787ee357e78c812d7f

winndows/cinder,sasukeh/cinder,manojhirway/ExistingImagesOnNFS,bswartz/cinder,nikesh-mahalka/cinder,sasukeh/cinder,Nexenta/cinder,eharney/cinder,takeshineshiro/cinder,Paul-Ezell/cinder-1,bswartz/cinder,takeshineshiro/cinder,eharney/cinder,Hybrid-Cloud/cinder,Datera/cinder,winndows/cinder,mahak/cinder,scality/cinder,duhzecca/cinder,scottdangelo/RemoveVolumeMangerLocks,apporc/cinder,scottdangelo/RemoveVolumeMangerLocks,dims/cinder,openstack/cinder,openstack/cinder,Datera/cinder,NetApp/cinder,nexusriot/cinder,cloudbase/cinder,nexusriot/cinder,Paul-Ezell/cinder-1,Hybrid-Cloud/cinder,cloudbase/cinder,phenoxim/cinder,Nexenta/cinder,j-griffith/cinder,j-griffith/cinder,dims/cinder,manojhirway/ExistingImagesOnNFS,ge0rgi/cinder,scality/cinder,apporc/cinder,nikesh-mahalka/cinder,NetApp/cinder,duhzecca/cinder,mahak/cinder,phenoxim/cinder