unbreak test_l3_odl failure
unbreak test_l3_odl failure

Neutron changeset of dd5976b7ab62ef2c75a3ca76d7ab53dcbc988f51
change id of I8775aa8a477191ef21e7c3c6da31d098befefc3c
adds 'project_id' to returned value.
It borke some tests of test_l3_odl due to value change.
This patch adds 'project_id' key to unbreak it.

Change-Id: I3d53e10d0c96971fc002ff5a58431137688c52eb
Closes-Bug: #1623689

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