One Convergence Group Policy Driver changes

1) Added missed GBP api rename updates on One Convergence drivers
2) Support vip_port parameter in One Convergence Service Chain Driver

Change-Id: I4e89819a52b61a585f943f787efc91cd16ccea6c
Closes-Bug: 1403483
Closes-Bug: 1403498
Merge "One Convergence Group Policy Driver changes"