Fix tox.ini to run unit tests on CI

Change-Id: I64a998b04e432397dcb34f70e7a0167374147eef
diff --git a/tcp_tests/managers/sl_manager.py b/tcp_tests/managers/sl_manager.py
index 2f76306..d66ee67 100644
--- a/tcp_tests/managers/sl_manager.py
+++ b/tcp_tests/managers/sl_manager.py
@@ -90,7 +90,7 @@
             cmd = ("cd {0}; "
                    "export VOLUME_STATUS='available'; "
                    "pytest -k 'not {1}' {2}".format(
-                tests_path, skip_tests, test_to_run))
+                       tests_path, skip_tests, test_to_run))
         else:
             cmd = ("cd {0}; "
                    "export VOLUME_STATUS='available'; "
@@ -112,12 +112,12 @@
             cmd = ("cd {0}; "
                    "export VOLUME_STATUS='available'; "
                    "pytest  --json=report.json -k 'not {1}' {2}".format(
-                tests_path, skip_tests, test_to_run))
+                       tests_path, skip_tests, test_to_run))
         else:
             cmd = ("cd {0}; "
                    "export VOLUME_STATUS='available'; "
                    "pytest --json=report.json -k {1}".format(
-                tests_path, test_to_run))
+                       tests_path, test_to_run))
         with self.__underlay.remote(node_name=target_node_name[0]) \
                 as node_remote:
             LOG.debug("Run {0} on the node {1}".format(
@@ -165,7 +165,7 @@
         prometheus_client = self.api
         try:
             current_targets = prometheus_client.get_targets()
-        except:
+        except Exception:
             LOG.info('Restarting keepalived service on mon nodes...')
             for node in nodes:
                 self._salt.local(tgt=node, fun='cmd.run',