Switch to stestr

According to Openstack summit session [1],
stestr is maintained project to which all Openstack projects should migrate.
Let's switch to stestr as other projects have already moved to it.

[1] https://etherpad.openstack.org/p/YVR-python-pti

Change-Id: Ib24a7937f1e3712294cdf699fa5b3a093645f35d

.gitignore

@@ -24,9 +24,8 @@ pip-log.txt
 # Unit test / coverage reports
 .coverage
 cover
-.testrepository
+.stestr/
 .tox
-nosetests.xml
 
 # Translations
 *.mo

.stestr.conf

@@ -0,0 +1,4 @@
+[DEFAULT]
+test_path=./os_apply_config/tests
+top_dir=./
+

.testr.conf

@@ -1,4 +0,0 @@
-[DEFAULT]
-test_command=${PYTHON:-python} -m subunit.run discover -t ./ . $LISTOPT $IDOPTION
-test_id_option=--load-list $IDFILE
-test_list_option=--list

lower-constraints.txt

@@ -27,7 +27,7 @@ six==1.10.0
 snowballstemmer==1.2.1
 Sphinx==1.6.5
 sphinxcontrib-websupport==1.0.1
-testrepository==0.0.18
+stestr==2.0.0
 testscenarios==0.4
 testtools==2.2.0
 traceback2==1.4.0

test-requirements.txt

@@ -7,7 +7,7 @@ coverage!=4.4,>=4.0 # Apache-2.0
 fixtures>=3.0.0 # Apache-2.0/BSD
 mock>=2.0.0 # BSD
 python-subunit>=1.0.0 # Apache-2.0/BSD
-sphinx!=1.6.6,!=1.6.7,>=1.6.2 # BSD
-testrepository>=0.0.18 # Apache-2.0/BSD
+sphinx!=1.6.6,!=1.6.7,>=1.6.5 # BSD
+stestr>=2.0.0 # Apache-2.0
 testscenarios>=0.4 # Apache-2.0/BSD
 testtools>=2.2.0 # MIT

tox.ini

@@ -11,7 +11,7 @@ deps =
        -r{toxinidir}/requirements.txt
        -r{toxinidir}/test-requirements.txt
 commands =
-  python setup.py testr --slowest --testr-args='{posargs}'
+  stestr run --slowest {posargs}
 
 [tox:jenkins]
 sitepackages = True
@@ -20,8 +20,13 @@ sitepackages = True
 commands = flake8
 
 [testenv:cover]
+setenv =
+    PYTHON=coverage run --source os_apply_config --parallel-mode
 commands =
-  python setup.py test --coverage --coverage-package-name=os_apply_config
+    stestr run '{posargs}'
+    coverage combine
+    coverage html -d cover
+    coverage xml -o cover/coverage.xml
 
 [testenv:venv]
 commands = {posargs}