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: I44170fcc60ad6e12d7badec354a96873e5cc91ea

.gitignore

@@ -21,7 +21,7 @@ develop-eggs
 .installed.cfg
 
 # Other
-.testrepository
+.stestr/
 .tox
 .*.swp
 .coverage

.stestr.conf

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

.testr.conf

@@ -1,8 +0,0 @@
-[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 ./ . $LISTOPT $IDOPTION
-
-test_id_option=--load-list $IDFILE
-test_list_option=--list

lower-constraints.txt

@@ -29,7 +29,7 @@ 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 @@ 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
 openstackdocstheme>=1.18.1 # Apache-2.0
-testrepository>=0.0.18 # Apache-2.0/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
@@ -28,8 +28,13 @@ commands =
 
 [testenv:cover]
 basepython = python3
+setenv =
+    PYTHON=coverage run --source $project --parallel-mode
 commands =
-  python setup.py testr --coverage
+    stestr run '{posargs}'
+    coverage combine
+    coverage html -d cover
+    coverage xml -o cover/coverage.xml
 
 [testenv:venv]
 basepython = python3