Refactor internal context testcases with ddt
Refactor internal context testcases with ddt

Use ddt to wrap internal context testcases.

Change-Id: I44ad096065d40d31929ee6aad4ca12ddaf6fe80d

openstack/cinder,mahak/cinder,openstack/cinder,Datera/cinder,phenoxim/cinder,Datera/cinder,phenoxim/cinder,j-griffith/cinder,j-griffith/cinder,mahak/cinder,eharney/cinder,eharney/cinder