Alcor routing rule API is different with OpenStack network API. Update Alcor routing rule API to keep consistent with OpenStack.
This PR correct two APIs which were not consistent:
OpenStack APIs:
1 /v2.0/routers/{router_id}/add_extraroutes
2 /v2.0/routers/{router_id}/remove_extraroutes
Alcor routing rule API is different with OpenStack network API. Update Alcor routing rule API to keep consistent with OpenStack.
This PR correct two APIs which were not consistent: OpenStack APIs: 1 /v2.0/routers/{router_id}/add_extraroutes 2 /v2.0/routers/{router_id}/remove_extraroutes
Alcor router manager APIs: 1 /project//routers//add_extra_routes 2 /project//routers//remove_extra_routes