tests: fix test failure with parrallel test

Several test cases re-use the same test class name,
which leads to test error when do parrallel test with TEST_JOBS=16,
change the test class names to unique values.

Type: fix
Signed-off-by: Tianyu Li <tianyu.li@arm.com>
Change-Id: Iefc01d40a25ebd60533baf3a2dc98a537437e8e9
diff --git a/test/test_l2bd_learnlimit_enabled.py b/test/test_l2bd_learnlimit_enabled.py
index 906ae14..5fcd54c 100644
--- a/test/test_l2bd_learnlimit_enabled.py
+++ b/test/test_l2bd_learnlimit_enabled.py
@@ -11,17 +11,17 @@
 from util import Host, ppp
 
 
-class TestL2LearnLimit(VppTestCase):
+class TestL2LearnLimitEnable(VppTestCase):
     """ L2 Global Learn limit Test Case """
 
     @classmethod
     def setUpClass(self):
-        super(TestL2LearnLimit, self).setUpClass()
+        super(TestL2LearnLimitEnable, self).setUpClass()
         self.create_pg_interfaces(range(3))
 
     @classmethod
     def tearDownClass(cls):
-        super(TestL2LearnLimit, cls).tearDownClass()
+        super(TestL2LearnLimitEnable, cls).tearDownClass()
 
     def create_hosts(self, pg_if, n_hosts_per_if, subnet):
         """
@@ -85,7 +85,7 @@
         self.assertEqual(len(lfs2), 0)
 
     def setUp(self):
-        super(TestL2LearnLimit, self).setUp()
+        super(TestL2LearnLimitEnable, self).setUp()
 
         self.vapi.bridge_domain_add_del(bd_id=1)
         self.vapi.bridge_domain_add_del(bd_id=2)
@@ -96,7 +96,7 @@
             self.pg_interfaces[1].sw_if_index, bd_id=2)
 
     def tearDown(self):
-        super(TestL2LearnLimit, self).tearDown()
+        super(TestL2LearnLimitEnable, self).tearDown()
         self.vapi.sw_interface_set_l2_bridge(
             rx_sw_if_index=self.pg_interfaces[0].sw_if_index,
             bd_id=1, enable=0)