Switch to using stestr

According to Openstack summit session [1] stestr is
maintained project to which all Openstack projects
should migrate.
Let's switch it then.

[1] https://etherpad.openstack.org/p/YVR-python-pti

Also update requirements to pass gating.

Change-Id: Ibc8575f9f1c6084ec3e695c1ba5827b712aba318
Signed-off-by: Charles Short <zulcss@gmail.com>

.coveragerc

@@ -0,0 +1,7 @@
+[run]
+branch = True
+source = virtualbmc
+omit = virtualbmc/tests/*
+
+[report]
+ignore_errors = True

.gitignore

@@ -28,6 +28,7 @@ cover
 .tox
 nosetests.xml
 .testrepository
+.stestr
 .venv
 
 # Translations

.stestr.conf

@@ -0,0 +1,3 @@
+[DEFAULT]
+test_path=${TESTS_DIR:-./virtualbmc/tests/unit/}
+top_dir=./

.testr.conf

@@ -1,7 +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

test-requirements.txt

@@ -13,6 +13,6 @@ oslotest>=3.2.0 # Apache-2.0
 testrepository>=0.0.18 # Apache-2.0/BSD
 testscenarios>=0.4 # Apache-2.0/BSD
 testtools>=2.2.0 # MIT
-os-testr>=1.0.0 # Apache-2.0
+stestr>=1.0.0 # Apache-2.0
 mock>=2.0.0 # BSD
 

tox.ini

@@ -15,7 +15,9 @@ deps =
     -c{env:UPPER_CONSTRAINTS_FILE:https://git.openstack.org/cgit/openstack/requirements/plain/upper-constraints.txt}
     -r{toxinidir}/test-requirements.txt
     -r{toxinidir}/requirements.txt
-commands = ostestr {posargs}
+commands =
+   stestr run '{posargs}'
+   stestr slowest
 passenv = http_proxy HTTP_PROXY https_proxy HTTPS_PROXY no_proxy NO_PROXY
 
 [testenv:pep8]
@@ -30,7 +32,13 @@ commands = {posargs}
 
 [testenv:cover]
 basepython = python3
-commands = python setup.py test --coverage --testr-args='{posargs}'
+setenv = {[testenv]setenv}
+         PYTHON=coverage run --source virtualbmc --parallel-mode
+commands =
+  stestr run {posargs}
+  coverage combine
+  coverage html -d cover
+  coverage xml -o cover/coverage.xml
 
 [testenv:docs]
 basepython = python3