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_cnat.py b/test/test_cnat.py
index ff8e1eb..9e979a4 100644
--- a/test/test_cnat.py
+++ b/test/test_cnat.py
@@ -6,6 +6,7 @@
 from asfframework import VppTestRunner
 from vpp_ip import INVALID_INDEX
 from itertools import product
+from config import config
 
 from scapy.packet import Raw
 from scapy.layers.l2 import Ether
@@ -335,6 +336,7 @@
 # -------------------------------------------------------------------
 
 
+@unittest.skipIf("cnat" in config.excluded_plugins, "Exclude CNAT plugin tests")
 class TestCNatTranslation(CnatCommonTestCase):
     """CNat Translation"""
 
@@ -679,6 +681,7 @@
         self.cnat_fhc_translation()
 
 
+@unittest.skipIf("cnat" in config.excluded_plugins, "Exclude CNAT plugin tests")
 class TestCNatSourceNAT(CnatCommonTestCase):
     """CNat Source NAT"""
 
@@ -818,6 +821,7 @@
         self.vapi.cnat_session_purge()
 
 
+@unittest.skipIf("cnat" in config.excluded_plugins, "Exclude CNAT plugin tests")
 class TestCNatDHCP(CnatCommonTestCase):
     """CNat Translation"""