The postgresql_privs module adds default arguments to the connection method

[abompard]

The connection method in psycopg2 must not contain keyword arguments when they should be left to a default value (None will not work). As a result, when connecting via socket is desired, the postgresql_privs module will error out with this message:

File "/tmp/ansible-1378419279.94-205411105299342/postgresql_privs", line 1495, in <module>
    main()
  File "/tmp/ansible-1378419279.94-205411105299342/postgresql_privs", line 544, in main
    conn = Connection(p.host, p.port, p.login, p.password, p.database)
  File "/tmp/ansible-1378419279.94-205411105299342/postgresql_privs", line 256, in __init__
    password=password, database=database
TypeError: argument 3 must be string, not None

The other postgresql modules (*_db and *_user) already implement parameter filtering, it could be copied from them.