Just use plain unittest

OBS-URL: https://build.opensuse.org/package/show/devel:languages:python/python-Twisted?expand=0&rev=67

skip_MultiCast.patch

@@ -1,10 +1,19 @@
 --- a/src/twisted/test/test_udp.py
 +++ b/src/twisted/test/test_udp.py
-@@ -500,6 +500,7 @@ class ReactorShutdownInteractionTests(un
+@@ -15,6 +15,8 @@ from twisted.internet.defer import Defer
+ from twisted.internet import protocol, reactor, error, defer, interfaces, udp
+ from twisted.python import runtime
+ 
++import unittest as pyunit
++
+ 
+ class Mixin:
+ 
+@@ -500,6 +502,7 @@ class ReactorShutdownInteractionTests(un
  
  
  
-+@unittest.skip("Multicast networking doesn't work with ")
++@pyunit.skip("Multicast networking doesn't work with ")
  class MulticastTests(unittest.TestCase):
  
      def setUp(self):