Swagger UI for AD-SAL

 -Use 'mvn clean install -P docs' to build swagger ui bundle
 -UI can be accessed at  http://<controller-ip:contoller-web-port>/swagger

Change-Id: I466518f78e23d31c15515f3dcd1f3e46af802f2d
Signed-off-by: mrajvaid <mrajvaid@cisco.com>
Merge "Swagger UI for AD-SAL"