Remove lbaas v1 service plugin stevedore aliases
Remove lbaas v1 service plugin stevedore aliases

The service plugin was removed from neutron-lbaas repo lately:
I506949e75bc62681412358ba689cb07b16311b68

We can now clean those remnants from neutron tree.

Change-Id: I2136a530a8351cc290418d9ae18af08b480707c5

mahak/neutron,huntxu/neutron,mahak/neutron,sebrandon1/neutron,eayunstack/neutron,sebrandon1/neutron,huntxu/neutron,noironetworks/neutron,openstack/neutron,openstack/neutron,igor-toga/local-snat,cloudbase/neutron,eayunstack/neutron,openstack/neutron,noironetworks/neutron,cloudbase/neutron,mahak/neutron,igor-toga/local-snat