pybind/rbd: RBD.create() method's 'old_format' parameter now defaults to False
The RBD v1 format has been deprecated for numerous releases and creation of
v1 format images has been disabled since the Mimic release. This fixes
the Python API's image create() method to ensure v2 images are created by
default (and no longer throw an exception that creation of v1 images are
disabled).
Fixes: https://tracker.ceph.com/issues/45504 Signed-off-by: Jason Dillaman <dillaman@redhat.com>