We don't need admin or internal endpoints in a normal devstack setup,
other basic projects are also only creating the public endpoint now.
Change-Id: I9bd6007509214c7a7ed7f7f4e391b609da4408a5
This adds the actual devstack plugin, devstack should not run the heat code
in the devstack project.
Note that this is not yet configured to run in the gate.
Change-Id: I8d0918a8f8bb8399793c7164d26739953710b3ec