Migrate to stestr

ostestr has already updated to stestr. Update the files here to make
sure it works properly.

Change-Id: I172cbb158f728a74bcb976fa68b78c28589eaa0c

.gitignore

@@ -1,5 +1,6 @@
 .coverage
 .testrepository
+.stestr
 subunit.log
 .venv
 *,cover

.stestr.conf

@@ -0,0 +1,3 @@
+[DEFAULT]
+test_path=./keystoneauth1/tests/unit
+top_dir=./

.testr.conf

@@ -1,4 +0,0 @@
-[DEFAULT]
-test_command=${PYTHON:-python} -m subunit.run discover -t ./  ${OS_TEST_PATH:-./keystoneauth1/tests/unit} $LISTOPT $IDOPTION
-test_id_option=--load-list $IDFILE
-test_list_option=--list

HACKING.rst

@@ -15,10 +15,10 @@ exceptions to an instance or subclass of ClientException.
 Testing
 =======
 
-keystoneauth uses testtools and testr for its unittest suite
-and its test runner. Basic workflow around our use of tox and testr can
+keystoneauth uses testtools and stestr for its unittest suite
+and its test runner. Basic workflow around our use of tox and stestr can
 be found at https://wiki.openstack.org/testr. If you'd like to learn more
 in depth:
 
-  https://testtools.readthedocs.org/
-  https://testrepository.readthedocs.org/
+  https://testtools.readthedocs.io/en/latest/
+  https://stestr.readthedocs.io/en/latest/

test-requirements.txt

@@ -18,7 +18,7 @@ betamax>=0.7.0 # Apache-2.0
 reno>=2.5.0 # Apache-2.0
 requests-mock>=1.1.0 # Apache-2.0
 sphinx>=1.6.2 # BSD
-testrepository>=0.0.18 # Apache-2.0/BSD
+stestr>=1.0.0 # Apache-2.0
 testresources>=0.2.4 # Apache-2.0/BSD
 testtools>=1.4.0 # MIT
 PyYAML>=3.10 # MIT

tox.ini

@@ -36,7 +36,14 @@ commands = bandit -r keystoneauth1 -x tests -s B110,B410
 commands = {posargs}
 
 [testenv:cover]
-commands = python setup.py testr --coverage --testr-args='{posargs}'
+setenv =
+    {[testenv]setenv}
+    PYTHON=coverage run --source keystoneauth1 --parallel-mode
+commands =
+    stestr run {posargs}
+    coverage combine
+    coverage html -d cover
+    coverage xml -o cover/coverage.xml
 
 [testenv:debug]
 commands = oslo_debug_helper -t keystoneauth1/tests {posargs}