[Libguestfs] [PATCH v2 0/2] v2v: Add -o openstack target.

[Richard W.M. Jones]

v1 was here:
https://www.redhat.com/archives/libguestfs/2018-August/thread.html#00287

v2:

 - The -oa option now gives an error; apparently Cinder cannot
   generally control sparse/preallocated behaviour, although certain
   Cinder backends can.

 - The -os option maps to Cinder volume type; suggested by Matt Booth.

 - Add a simple test.