Updated openstack/openstack
Project: openstack/heat  fdb0ae71b2d2f98b20c87cd562cd294f468178fd
null
Add more unit tests for ThreadGroupManager

this patch adds unit tests for the rest of ThreadGroupManager methods.
Related-Bug: #1288627
Change-Id: I38a0864c649d1693ef4fb5b49d5aeb37632263ca