There is a bug in OVS 2.12 where it's impossible to change protocol on
a bridge. This patch should be reverted once OVS is fixed. More
information about the bug at [1].
[1] https://bugzilla.redhat.com/show_bug.cgi?id=1782834
Related-Bug: #1852221
Change-Id: I1ead1eee48a0c56193f20797ab35be36a0458270
(cherry picked from commit 0643ab44d8)