Tests:  Cleanup @skip decorator.

The runnning environment is static as of module load time,
so only evalute the conditions once at module load time.

Track-by: VPP-1518

Change-Id: I73b0d17ae1ff90789e70307f168d43921829aec8
Signed-off-by: Paul Vinciguerra <pvinci@vinciconsulting.com>
diff --git a/test/test_vom.py b/test/test_vom.py
index 6aba555..222d72c 100644
--- a/test/test_vom.py
+++ b/test/test_vom.py
@@ -8,7 +8,7 @@
     VppTestRunner, Worker
 
 
-@unittest.skipUnless(running_extended_tests(), "part of extended tests")
+@unittest.skipUnless(running_extended_tests, "part of extended tests")
 class VOMTestCase(VppTestCase):
     """ VPP Object Model Test """