Comment 1 for bug 1812177

Reviewed: https://review.openstack.org/631179
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=975f0156137e37f7a9139c0268547d79dcc3c43c
Submitter: Zuul
Branch: master

commit 975f0156137e37f7a9139c0268547d79dcc3c43c
Author: Balazs Gibizer <email address hidden>
Date: Wed Jan 16 10:57:07 2019 +0100

    Fix incompatible version handling in BuildRequest

    The BuildRequest object code assumed that IncompatibleObjectVersion
    exception has a objver field that contains the object version. This
    assumption is not true. The unit test made another mistake serializing
    the function object obj_to_primitive instead of serializing the result
    of the call of obj_to_primitive. This caused a false positive test
    covering the error in the implementation as well.

    Closes-Bug: #1812177

    Change-Id: I1ef4a23aa2bf5cb46b481045f3d968f62f74606d