LBaaS v1 api is completely removed by neutron, so it
cannot be used now. Added Support of LBaaS v2 API.
Now all COE's uses LBaaS v2.
Co-Authored-By: yatin karel <yatin.karel@nectechnologies.in>
Change-Id: Idbccbe1065857449fc8e158115b7833b68c2da9f
Partially-Implements: blueprint magnum-lbaasv2-support