Switch to use stestr instead of ostestr

This commit switches to use stestr[1] instead of ostestr. We don't need
to use ostestr layer because we can use stestr directory.

[1] https://github.com/mtreinish/stestr

Change-Id: I566dca2f3052520a09558bf315b433984c221034

.gitignore

@@ -35,7 +35,7 @@ pip-log.txt
 !.coveragerc
 .tox
 nosetests.xml
-.testrepository
+.stestr
 .venv
 
 # Translations

.stestr.conf

@@ -0,0 +1,2 @@
+[DEFAULT]
+test_path=./openstack_health/tests

test-requirements.txt

@@ -5,7 +5,7 @@ hacking<0.11,>=0.10.0
 
 coverage!=4.4,>=4.0 # Apache-2.0
 docutils>=0.11 # OSI-Approved Open Source, Public Domain
-os-testr>=0.8.0 # Apache-2.0
+stestr>=1.0.0 # Apache-2.0
 mock>=2.0 # BSD
 fixtures>=3.0.0 # Apache-2.0/BSD
 sphinx>=1.6.2 # BSD

tox.ini

@@ -12,7 +12,7 @@ deps = -r{toxinidir}/requirements.txt
        -r{toxinidir}/test-requirements.txt
 commands =
          find . -type f -name "*.pyc" -delete
-         ostestr {posargs}
+         stestr run {posargs}
 
 [testenv:venv]
 commands = {posargs}
@@ -26,7 +26,14 @@ commands =
    flake8 {toxinidir}/openstack_health {posargs}
 
 [testenv:cover]
-commands = python setup.py test --coverage --coverage-package-name='openstack_health' --testr-args={posargs}
+setenv =
+   {[testenv]setenv}
+   PYTHON = coverage run --source openstack_health --parallel-mode
+commands =
+   stestr run {posargs}
+   coverage combine
+   coverage html -d cover
+   coverage xml -o cover/coverage.xml
 
 [flake8]
 # E125 is a won't fix until https://github.com/jcrocholl/pep8/issues/126 is resolved.  For further detail see https://review.openstack.org/#/c/36788/