Workaround broken Neutron requirements.
Workaround broken Neutron requirements.

Neutron have introduced another hard dependency on unreleased
python-neutronclient :(.

Change-Id: I10702098192c0393a91efbd707c61f5b0e627de6
Partial-Bug: 1280941

rdo-management/tripleo-image-elements,radez/tripleo-image-elements,radez/tripleo-image-elements,openstack/tripleo-image-elements,rdo-management/tripleo-image-elements,openstack/tripleo-image-elements