Carbon tempest CI fix: let ODL create br-int
Carbon tempest CI fix: let ODL create br-int

To avoid this bug until it is fixed:
https://bugs.opendaylight.org//show_bug.cgi?id=8893

Note that it would be better to run with devstack
creating br-int because that is how most customers
will be using this but until the above bug is fixed
let's have a working gate.

Change-Id: I2b2b4e0e754f3d492fc0a2808272e204dac82e91

openstack/networking-odl,openstack/networking-odl,openstack/networking-odl