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: If740b4f0946c15a3bb3c3f405edbcee66e66c460

.gitignore

@@ -22,8 +22,7 @@ pip-log.txt
 .coverage
 cover
 .tox
-nosetests.xml
-.testrepository
+.stestr/
 
 # Developer
 .project

.stestr.conf

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

requirements.txt

@@ -4,7 +4,7 @@
 pbr!=2.1.0,>=2.0.0 # Apache-2.0
 aodhclient>=0.9.0 # Apache-2.0
 gnocchiclient>=3.3.1 # Apache-2.0
-python-barbicanclient!=4.5.0,!=4.5.1,>=4.0.0 # Apache-2.0
+python-barbicanclient>=4.5.2 # Apache-2.0
 python-congressclient<2000,>=1.3.0 # Apache-2.0
 python-designateclient>=2.7.0 # Apache-2.0
 python-heatclient>=1.10.0 # Apache-2.0

test-requirements.txt

@@ -5,6 +5,7 @@ hacking<0.11,>=0.10.0
 
 # this is required for the tests
 oslotest>=1.10.0 # Apache-2.0
+stestr>=2.0.0 # Apache-2.0
 
 # this is required for the docs
 sphinx>=1.6.2 # BSD

tox.ini

@@ -4,7 +4,7 @@ envlist = py35,py27,pep8
 
 [testenv]
 deps = -r{toxinidir}/test-requirements.txt
-commands = python setup.py testr --slowest --testr-args='{posargs}'
+commands = stestr run --slowest {posargs}
 
 [testenv:pep8]
 deps=-r{toxinidir}/test-requirements.txt