tests: skip more excluded plugin tests

Check and skip VPP_EXCLUDED_PLUGINS tests for most of plugins.

Type: improvement
Signed-off-by: Dmitry Valter <d-valter@yandex-team.com>
Change-Id: I23fd3666729251c639aa8da72a676058e3f5bb4e
diff --git a/test/test_nat44_ed_output.py b/test/test_nat44_ed_output.py
index dbf1dc4..eea610d 100644
--- a/test/test_nat44_ed_output.py
+++ b/test/test_nat44_ed_output.py
@@ -9,6 +9,7 @@
 from framework import VppTestCase
 from asfframework import VppTestRunner
 from vpp_papi import VppEnum
+from config import config
 
 
 def get_nat44_ed_in2out_worker_index(ip, vpp_worker_count):
@@ -21,6 +22,7 @@
     return 1 + h % vpp_worker_count
 
 
+@unittest.skipIf("nat" in config.excluded_plugins, "Exclude NAT plugin tests")
 class TestNAT44EDOutput(VppTestCase):
     """NAT44 ED output feature Test Case"""