Comment 6 for bug 1670628

As noted in the review [0], the bug that this was working around was fixed in OVS 2.6.0 [1], meaning that commit 33cc64fb817 mentioned above is not only causing issues with some patches but it should also no longer be necessary. IMO, we should likely revert it in it's entirety, which is what [0] is pretty much doing.

[0] https://review.openstack.org/#/c/546588/1
[1] https://github.com/openvswitch/ovs/commit/e21c6643a02c6b446d2fbdfde366ea303b4c2730