Remove file extension from policy names (#3805)

Fixes #3804.

Prevents `__file__` from contributing ".", which is an illegal character in ELB policy names.

cloud/amazon/ec2_elb_lb.py

@@ -976,7 +976,7 @@ class ElbManager(object):
             self.elb_conn.modify_lb_attribute(self.name, 'ConnectingSettings', attributes.connecting_settings)
 
     def _policy_name(self, policy_type):
-        return __file__.split('/')[-1].replace('_', '-')  + '-' + policy_type
+        return __file__.split('/')[-1].split('.')[0].replace('_', '-')  + '-' + policy_type
 
     def _create_policy(self, policy_param, policy_meth, policy):
         getattr(self.elb_conn, policy_meth )(policy_param, self.elb.name, policy)