Comment 0 for bug 1757063

When running the command
# openstack router unset --external-gateway router1

I get the following error:
HttpException: Unknown error

Version
=======
python-networking-odl-12.0.0-0.20180220171331.8733cf6.el7ost.noarch

Server log
==========
2018-03-20 07:31:24.277 25 DEBUG neutron.api.v2.base [req-127f7c44-3f10-4d6e-b070-c478354f2bdd 58f3ccc3684246e28c5a035ed548b014 c45afc7840c0411db2652b6be39f8de0 - default default] Request body: {u'router': {u'external_gateway_info': {}}} prepare_request_body /usr/lib/python2.7/site-packages/neutron/api/v2/base.py:690
    2018-03-20 07:31:24.732 25 INFO neutron.api.v2.resource [req-127f7c44-3f10-4d6e-b070-c478354f2bdd 58f3ccc3684246e28c5a035ed548b014 c45afc7840c0411db2652b6be39f8de0 - default default] update failed (client error): There was a conflict when trying to complete your request.
    2018-03-20 07:31:24.734 25 INFO neutron.wsgi [req-127f7c44-3f10-4d6e-b070-c478354f2bdd 58f3ccc3684246e28c5a035ed548b014 c45afc7840c0411db2652b6be39f8de0 - default default] 172.17.1.22 "PUT /v2.0/routers/2f31ebd8-f9e6-433e-b968-f312350d6a80 HTTP/1.1" status: 409 len: 466 time: 0.4694970