Add job for running unit tests

Change-Id: I333b1f168314e73e9b0470041a16c0297b2cd562

.zuul.yaml

@@ -1,7 +1,5 @@
 - project:
-    check:
-      jobs:
-        - openstack-tox-pep8
-    gate:
-      jobs:
-        - openstack-tox-pep8
+    templates:
+      - openstack-python-jobs
+      - openstack-python35-jobs
+      - openstack-python36-jobs

os_ken/cmd/manager.py

@@ -29,7 +29,7 @@ from os_ken import log
 log.early_init_log(logging.DEBUG)
 
 from os_ken import flags
-from os_ken import version
+from os_ken import __version__ as version
 from os_ken.app import wsgi
 from os_ken.base.app_manager import AppManager
 from os_ken.controller import controller

os_ken/tests/unit/test_requirements.py

@@ -28,8 +28,7 @@ LOG = logging.getLogger(__name__)
 
 MOD_DIR = os.path.dirname('file://' + sys.modules[__name__].__file__)
 _RYU_REQUIREMENTS_FILES = [
-    '../../../tools/pip-requires',
-    '../../../tools/optional-requires',
+    '../../../requirements.txt',
 ]
 RYU_REQUIREMENTS_FILES = [
     os.path.join(MOD_DIR, f) for f in _RYU_REQUIREMENTS_FILES]

tox.ini

@@ -13,7 +13,10 @@ setenv =
    OS_STDERR_CAPTURE=1
    OS_TEST_TIMEOUT=60
 deps = -r{toxinidir}/test-requirements.txt
-commands = stestr run {posargs}
+# TODO(hongbin): this is the way Ryu runs unit tests and we inherit
+# this approach as a start. In the future, we should migrate to stestr
+# for consistency with other OpenStack projects.
+commands = python ./os_ken/tests/run_tests.py {posargs}
 
 [testenv:pep8]
 basepython = python3