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

test/test_cdp.py

@@ -17,6 +17,7 @@ from scapy.all import raw
 from re import compile
 from time import sleep
 from util import ppp
+from config import config
 import platform
 import sys
 import unittest
@@ -39,6 +40,7 @@ class CustomTLV(Packet):
     ]
 
 
+@unittest.skipIf("cdp" in config.excluded_plugins, "Exclude CDP plugin tests")
 class TestCDP(VppTestCase):
     """CDP Test Case"""