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: I1b5bd8a53d0f93b99dd60fd5711a60f1135bcc4c

.gitignore

@@ -19,6 +19,7 @@ pip-log.txt
 # Unit test / coverage reports
 .coverage
 .tox
+.stestr/
 
 #Translations
 *.mo
@@ -32,7 +33,6 @@ tags
 # pbr generated files
 AUTHORS
 ChangeLog
-/.testrepository/
 
 # reno build
 releasenotes/build

.stestr.conf

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

.testr.conf

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

lower-constraints.txt

@@ -24,7 +24,7 @@ smmap==0.9.0
 snowballstemmer==1.2.1
 Sphinx==1.6.5
 sphinxcontrib-websupport==1.0.1
-testrepository==0.0.18
+stestr==2.0.0
 testtools==2.2.0
 traceback2==1.4.0
 unittest2==1.1.0

test-requirements.txt

@@ -4,8 +4,8 @@
 
 mock>=2.0.0 # BSD
 coverage!=4.4,>=4.0 # Apache-2.0
-testrepository>=0.0.18 # Apache-2.0/BSD
+stestr>=2.0.0 # Apache-2.0
 # sphinx is needed for testing the sphinxext module
-sphinx!=1.6.6,!=1.6.7,>=1.6.2 # BSD
+sphinx!=1.6.6,!=1.6.7,>=1.6.5 # BSD
 # Bandit security code scanner
 bandit>=1.1.0 # Apache-2.0

tox.ini

@@ -9,7 +9,7 @@ deps =
   -r{toxinidir}/test-requirements.txt
   -r{toxinidir}/requirements.txt
 distribute = False
-commands = python setup.py testr --testr-args='{posargs}'
+commands = stestr run {posargs}
 
 [testenv:py27]
 basepython = python2.7