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: I75bea8174b9473b0648e1fc524dd8ea25dfb666d

.gitignore

@@ -27,7 +27,7 @@ pip-log.txt
 .tox
 nosetests.xml
 cover
-.testrepository
+.stestr/
 *.sqlite
 .venv
 

.stestr.conf

@@ -0,0 +1,4 @@
+[DEFAULT]
+test_path=./osprofiler/tests/unit
+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 ./ ${OS_TEST_PATH:-./osprofiler/tests/unit} $LISTOPT $IDOPTION
-test_id_option=--load-list $IDFILE
-test_list_option=--list

lower-constraints.txt

@@ -18,6 +18,6 @@ reno===2.5.0
 requests===2.14.2
 six===1.10.0
 sphinx===1.6.2
-testrepository===0.0.18
+stestr==2.0.0
 testtools===2.2.0
 WebOb===1.7.1

test-requirements.txt

@@ -3,7 +3,7 @@ hacking>=0.12.0,!=0.13.0,<0.14  # Apache-2.0
 coverage>=4.0 # Apache-2.0
 ddt>=1.0.1  # MIT
 mock>=2.0.0 # BSD
-testrepository>=0.0.18 # Apache-2.0/BSD
+stestr>=2.0.0 # Apache-2.0
 testtools>=2.2.0 # MIT
 
 openstackdocstheme>=1.18.1 # Apache-2.0

tox.ini

@@ -14,12 +14,9 @@ deps =
   -r{toxinidir}/test-requirements.txt
 install_command = pip install -U {opts} {packages}
 usedevelop = True
-commands = python setup.py testr --slowest --testr-args='{posargs}'
+commands = stestr run --slowest {posargs}
 distribute = false
 
-[testenv:py27]
-basepython = python2.7
-
 [testenv:functional]
 basepython = python2.7
 setenv = {[testenv]setenv}
@@ -47,7 +44,13 @@ commands = {posargs}
 
 [testenv:cover]
 basepython = python3
-commands = python setup.py testr --coverage --testr-args='{posargs}'
+setenv =
+    PYTHON=coverage run --source osprofiler --parallel-mode
+commands =
+    stestr run '{posargs}'
+    coverage combine
+    coverage html -d cover
+    coverage xml -o cover/coverage.xml
 
 [testenv:docs]
 basepython = python3