Updated openstack/openstack
Project: openstack/nova  2ce626fb53e5cbbd736fe7c37edfc338bdfd331c
null
Explicity teardown on error in libguestfs setup()

Previously, in the setup method of the libguestfs driver
for Nova's VFS, on an error the handle object was simply
dereferenced (set to None), and then an new error was thrown.
This relied on an implicit close() on the handle being called
by GC.  However, in some cases the setup progresses far enough
that the implicit close is not enough, and leaves an "orphaned"
libguestfs VM.

Now, the teardown() method is called explicitly, which ensures that
no "orphaned" VMs are left around in case of an error.

Change-Id: I7fbe470046ce6c76bc13d77d8df360351a3ef715
Fixes: bug #1270304
(cherry picked from commit fa62cfe15fd6dddecf657966d166a2d3a2bdd317)