Fix tox.ini to run unit tests on CI

Change-Id: I64a998b04e432397dcb34f70e7a0167374147eef
diff --git a/tcp_tests/tests/system/test_failover.py b/tcp_tests/tests/system/test_failover.py
index 11173ce..9007eba 100644
--- a/tcp_tests/tests/system/test_failover.py
+++ b/tcp_tests/tests/system/test_failover.py
@@ -52,7 +52,7 @@
     @pytest.mark.grab_versions
     @pytest.mark.fail_snapshot
     def test_restart_ctl01_node(self, underlay, openstack_deployed,
-                                      openstack_actions, show_step):
+                                openstack_actions, show_step):
         """Test restart ctl01
 
         Scenario:
@@ -353,9 +353,9 @@
     @pytest.mark.grab_versions
     @pytest.mark.fail_snapshot
     def test_stop_influxdb_relay_mon_nodes(self, underlay,
-                                            openstack_deployed,
-                                            openstack_actions,
-                                            sl_deployed):
+                                           openstack_deployed,
+                                           openstack_actions,
+                                           sl_deployed):
         """Test stop influxdb relay on mon01 node
 
         Scenario:
@@ -412,9 +412,9 @@
     @pytest.mark.grab_versions
     @pytest.mark.fail_snapshot
     def test_stop_influxdb_mon_nodes(self, underlay,
-                                      openstack_deployed,
-                                      openstack_actions,
-                                      sl_deployed):
+                                     openstack_deployed,
+                                     openstack_actions,
+                                     sl_deployed):
         """Test stop influxdb on mon01 node
 
         Scenario:
@@ -458,7 +458,7 @@
         assert 'mymeas' in sl_deployed.check_data_in_influxdb('mon01')
         assert 'mymeas' in sl_deployed.check_data_in_influxdb('mon02')
         # STEP #10
-      
+
         after_result = sl_deployed.run_sl_tests_json(
             'cfg01', '/root/stacklight-pytest/stacklight_tests/',
             'tests/prometheus/', 'test_alerts.py')