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_pppoe.py b/test/test_pppoe.py
index e396250..4a6a025 100644
--- a/test/test_pppoe.py
+++ b/test/test_pppoe.py
@@ -13,8 +13,10 @@
 from vpp_ip_route import VppIpRoute, VppRoutePath
 from vpp_pppoe_interface import VppPppoeInterface
 from util import ppp
+from config import config
 
 
+@unittest.skipIf("pppoe" in config.excluded_plugins, "Exclude PPPoE plugin tests")
 class TestPPPoE(VppTestCase):
     """PPPoE Test Case"""