Set default auth plugin back to 'password'

This was a hack that should be less needed now...

Change-Id: Id8cba87ad05b106aa36e356c0d70a568316fd327

Author: Dean Troyer

openstackclient/shell.py

@@ -203,7 +203,7 @@ def initialize_app(self, argv):
             # Use service token authentication
             auth_type = 'token_endpoint'
         else:
-            auth_type = 'osc_password'
+            auth_type = 'password'
 
         project_id = getattr(self.options, 'project_id', None)
         project_name = getattr(self.options, 'project_name', None)