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: I0190d49f1f6153937a2032f199a17696c21efa83

.gitignore

@@ -18,7 +18,7 @@ pip-log.txt
 # Unit test / coverage reports
 .coverage
 .tox
-.testrepository
+.stestr/
 
 #Translations
 *.mo

.stestr.conf

@@ -0,0 +1,4 @@
+[DEFAULT]
+test_path=./mox3/tests
+top_dir=./
+

.testr.conf

@@ -1,4 +0,0 @@
-[DEFAULT]
-test_command=OS_STDOUT_CAPTURE=1 OS_STDERR_CAPTURE=1 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

@@ -24,7 +24,7 @@ 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
 testtools==2.2.0
 traceback2==1.4.0
 unittest2==1.1.0

test-requirements.txt

@@ -8,12 +8,12 @@ flake8<2.6.0,>=2.5.4 # MIT
 
 coverage!=4.4,>=4.0 # Apache-2.0
 python-subunit>=1.0.0 # Apache-2.0/BSD
-testrepository>=0.0.18 # Apache-2.0/BSD
+stestr>=2.0.0 # Apache-2.0
 testtools>=2.2.0 # MIT
 
 six>=1.10.0 # MIT
 
 # this is required for the docs build jobs
-sphinx!=1.6.6,!=1.6.7,>=1.6.2 # BSD
+sphinx!=1.6.6,!=1.6.7,>=1.6.5 # BSD
 openstackdocstheme>=1.18.1 # Apache-2.0
 

tox.ini

@@ -8,11 +8,7 @@ deps =
        -c{env:UPPER_CONSTRAINTS_FILE:https://git.openstack.org/cgit/openstack/requirements/plain/upper-constraints.txt}
        -r{toxinidir}/requirements.txt
        -r{toxinidir}/test-requirements.txt
-commands =
+commands = stestr run --slowest {posargs}
-  python setup.py testr --slowest --testr-args='{posargs}'
-
-[testenv:py27]
-basepython = python2.7
 
 [testenv:docs]
 basepython = python3
@@ -26,11 +22,6 @@ commands = flake8
 basepython = python3
 commands = {posargs}
 
-[testenv:cover]
-basepython = python3
-commands =
-  python setup.py testr --coverage
-
 [flake8]
 show-source = true
 ignore = E721