- Adding LBaaS handler skeleton to net-virt bundle, appropriate entries
in AbstractEvent and Activator.

- Fixing Postman examples for LBaaS.

Change-Id: Id878ffe5bf1e8b1819a18f103b5ee9c4fe74e05e
Signed-off-by: Srini Seetharaman <srini.seetharaman@gmail.com>