Making Project the default environment.

The initial checkin required that the F5LBaaSV2Driver be subclassed
with a class that would explicitly set the environment.  This makes
'Project' the default environment.

neutron_lbaas/drivers/f5/driver_v2.py

@@ -30,7 +30,7 @@ class UndefinedEnvironment(Exception):
 
 class F5LBaaSV2Driver(driver_base.LoadBalancerBaseDriver):
 
-    def __init__(self, plugin, env=None):
+    def __init__(self, plugin, env='Project'):
         super(F5LBaaSV2Driver, self).__init__(plugin)
 
         self.load_balancer = LoadBalancerManager(self)