Added new loadbalancerv2.py extension module.  Added new LoadBalancerPlu...

...ginv2 class to plugin.py module. Added new loadbalancer_dbv2.py modules.

Change-Id: I43270fdf9cd52a57274575ecea502f660ff0d5a9
this will fail pep8 checks.  if you "pip install hacking", then run flake8 <dir>, it'll give you a list of the openstack nits.