Replace python-openstacksdk with openstacksdk
Replace python-openstacksdk with openstacksdk

This patch renames the dependency to python-openstacksdk to dependency
to openstacksdk (renamed after 0.5.0?). This is for Senlin to enjoy the
latest sdk feature.

Change-Id: I0a8d4e868f6806968e68969ded361fe1717e37e7

Alzon/senlin,openstack/senlin,tengqm/senlin-container,openstack/senlin,Alzon/senlin,openstack/senlin,tengqm/senlin-container,stackforge/senlin,stackforge/senlin