L2SS-240: Configure tox for both tests directories

devices/.stestr.conf

 [DEFAULT]
-test_path=./test
+test_path=${TESTS_DIR:-./test}
 top_dir=./

devices/integration_test/README.md

+# Integration tests
+
+**Warning running these tests will make changes to your local system**
\ No newline at end of file

devices/integration_test/base.py

+# -*- coding: utf-8 -*-
+#
+# This file is part of the LOFAR 2.0 Station Software
+#
+#
+#
+# Distributed under the terms of the APACHE license.
+# See LICENSE.txt for more info.
+
+import unittest
+import testscenarios
+
+
+class BaseIntegrationTestCase(testscenarios.WithScenarios, unittest.TestCase):
+    """Integration test base class."""
+
+    def setUp(self):
+        super().setUp()
+
+
+class IntegrationTestCase(BaseIntegrationTestCase):
+    """Integration test case base class for all unit tests."""
+
+    def setUp(self):
+        super().setUp()

devices/tox.ini

@@ -17,6 +17,12 @@ deps = -r{toxinidir}/test-requirements.txt
     -r{toxinidir}/../docker-compose/lofar-device-base/lofar-requirements.txt
 commands = stestr run {posargs}
 
+[testenv:integration]
+; Warning running integration tests will make changes to your docker system!
+setenv = TESTS_DIR=./integration_test
+commands =
+    stestr run --serial
+
 ; TODO(Corne): Integrate Hacking to customize pep8 rules
 [testenv:pep8]
 commands =