Restructing the LBaaSHandler code, and adding calls to the
LoadBalancerProvider for the ADD and DELETE operations.

Change-Id: I2b7991abe8c2d5a1abad74cc510a576d67a98219
Signed-off-by: Srini Seetharaman <srini.seetharaman@gmail.com>
Merge "Restructing the LBaaSHandler code, and adding calls to the LoadBalancerProvider for the ADD and DELETE operations."