Set up tox to run unit tests

Makes changes to tox configuration so unit tests can be run in the py27
environment.

Change-Id: I4867dfbdf180e6f84ca178b0770a3a3ae0ce32bf

.testr.conf

@@ -0,0 +1,7 @@
+[DEFAULT]
+test_command=OS_STDOUT_CAPTURE=${OS_STDOUT_CAPTURE:-1} \
+             OS_STDERR_CAPTURE=${OS_STDERR_CAPTURE:-1} \
+             OS_TEST_TIMEOUT=${OS_TEST_TIMEOUT:-60} \
+             ${PYTHON:-python} -m subunit.run discover -t ./ ${OS_TEST_PATH:-./orm/tests/unit}  $LISTOPT $IDOPTION
+test_id_option=--load-list $IDFILE
+test_list_option=--list

test-requirements.txt

@@ -11,6 +11,7 @@ oslotest>=1.10.0 # Apache-2.0
 testrepository>=0.0.18  # Apache-2.0/BSD
 testtools>=1.4.0 # MIT
 openstackdocstheme>=1.11.0  # Apache-2.0
+os-testr>=0.8.0 # Apache-2.0
 # releasenotes
 reno>=1.8.0 # Apache-2.0
 

tox.ini

@@ -9,8 +9,17 @@ install_command = pip install -c{env:UPPER_CONSTRAINTS_FILE:https://git.openstac
 setenv =
    VIRTUAL_ENV={envdir}
    PYTHONWARNINGS=default::DeprecationWarning
+
 deps = -r{toxinidir}/test-requirements.txt
 
+commands =
+    find . -type f -name "*.pyc" -delete
+    ostestr {posargs}
+
+whitelist_externals =
+  bash
+  find
+
 [testenv:pep8]
 commands = flake8 {posargs}
 
@@ -18,7 +27,7 @@ commands = flake8 {posargs}
 commands = {posargs}
 
 [testenv:cover]
-commands = python setup.py test --coverage --testr-args='{posargs}'
+commands = python setup.py testr --coverage --testr-args='{posargs}'
 
 [testenv:docs]
 commands = python setup.py build_sphinx