Python 3 port: ignore pylint suggestion on a mandatory "ctx" parameter

That is already used when the detected version is Python 3, but
pylint doesn't know about it, so let's make it ignore that.
Signed-off-by: NCleber Rosa <crosa@redhat.com>

avocado/core/runner.py

@@ -584,7 +584,7 @@ class TestRunner(object):
             ctx = multiprocessing.get_context('spawn')
             queue = queues.SimpleQueue(ctx=ctx)     # pylint: disable=E1123
         else:
-            queue = queues.SimpleQueue()
+            queue = queues.SimpleQueue()     # pylint: disable=E1125
 
         if timeout > 0:
             deadline = time.time() + timeout