Fix the tests.

For some reason, database key was treated differently in configparser object
in python 3.4.2. In Python 3.4.5 everything is fine. Fixed the defaults to
make sure all string options are treated equally.

tests/test_config.py

@@ -51,13 +51,6 @@ class TestConfig(unittest.TestCase):
         args.config = None
         args.parser = 'fetch'
         args.verbose = 2
-        args.quiet = None
-        args.channels = None
-        args.database = None
-        args.user = None
-        args.password = None
-        args.team = None
-        args.token = None
 
         conf = config.Config()
         conf.update(args)
@@ -66,7 +59,7 @@ class TestConfig(unittest.TestCase):
                                           'verbose': 2,
                                           'quiet': 0,
                                           'channels': [],
-                                          'database': '',
+                                          'database': None,
                                           'user': None,
                                           'password': None,
                                           'team': None,