To avoid multiple default providers for service LOADBALANCE. This was causing problem in icehouse after setting up
opencontrail service_provider for load balancer. icehouse neutron.conf has default set already,
deleting before setting a new one.
This will fix https://bugs.launchpad.net/juniperopenstack/r1.1/+bug/1363066 for icehouse along with Ajay's changes
in loadbalance_db.py for setup VncApi with proper Auth credentials

Change-Id: I5bd76d9c5ea007def880ddc5d5defb8b816abd29
Merge "To avoid multiple default providers for service LOADBALANCE. This was causing problem in icehouse after setting up opencontrail service_provider for load balancer. icehouse neutron.conf has default set already, deleting before setting a new one. This will fix https://bugs.launchpad.net/juniperopenstack/r1.1/+bug/1363066 for icehouse along with Ajay's changes in loadbalance_db.py for setup VncApi with proper Auth credentials" into R1.10