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: I2ee7c8a4f5cd91e77ddeccc84354dedf6e7e9196

.gitignore

@@ -15,6 +15,6 @@ doc/source/api/
 *.egg
 .autogenerated
 .coverage
-.testrepository/
+.stestr/
 .tox/
 .idea

.stestr.conf

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

.testr.conf

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

test-requirements.txt

@@ -10,5 +10,5 @@ mock>=2.0 # BSD
 python-subunit>=0.0.18 # Apache-2.0/BSD
 sphinx>=1.5.1 # BSD
 sphinxcontrib-httpdomain # BSD
-testrepository>=0.0.18 # Apache-2.0/BSD
+stestr>=2.0.0 # Apache-2.0
 testtools>=1.4.0 # MIT

tox.ini

@@ -9,7 +9,7 @@ install_command = pip install -U {opts} {packages}
 setenv =
    VIRTUAL_ENV={envdir}
 deps = -r{toxinidir}/test-requirements.txt
-commands = python setup.py test --slowest --testr-args='{posargs}'
+commands = stestr run --slowest {posargs}
 
 [testenv:pep8]
 commands = flake8
@@ -18,7 +18,13 @@ commands = flake8
 commands = {posargs}
 
 [testenv:cover]
-commands = python setup.py testr --coverage --testr-args='{posargs}'
+setenv =
+    PYTHON=coverage run --source $project --parallel-mode
+commands =
+    stestr run '{posargs}'
+    coverage combine
+    coverage html -d cover
+    coverage xml -o cover/coverage.xml
 
 [testenv:genconfig]
 commands =