Remove F403 and F405 exclusions

Importing from * is not a thing that should be done, as it masks
errors and makes code hard to understand. There are some copy-pasta
files that violate this. Mark them with noqa for now, because we don't
actually care about them.

Change-Id: I790f88c75ea546d83e347e42df0050ad36211936

tests/unit/compat/unittest.py

@@ -31,8 +31,8 @@ import sys
 if sys.version_info < (2, 7):
     try:
         # Need unittest2 on python2.6
-        from unittest2 import *
+        from unittest2 import *  # noqa
     except ImportError:
         print('You need unittest2 installed on python2.6.x to run tests')
 else:
-    from unittest import *
+    from unittest import *  # noqa