Switch from ostestr to stestr

os-testr has moved over to use stestr instead of testr. This change
updates the tox.ini file to call stestr directly instead of going
through ostestr and remove testrepository from test-requirements.txt.

Change-Id: I31fa5fefd610ec783471e15992675bd39ff0ebc4

.gitignore

@@ -1,7 +1,7 @@
 /.*
 !.gitignore
 !.mailmap
-!.testr.conf
+!.stestr.conf
 .*.sw?
 subunit.log
 *,cover

test-requirements.txt

@@ -10,6 +10,5 @@ mock>=2.0.0 # BSD
 requests-mock>=1.2.0 # Apache-2.0
 tempest>=17.1.0 # Apache-2.0
 testtools>=2.2.0 # MIT
-testrepository>=0.0.18 # Apache-2.0/BSD
-os-testr>=1.0.0 # Apache-2.0
+stestr>=1.0.0 # Apache-2.0
 oslo.serialization!=2.19.1,>=2.18.0 # Apache-2.0

tox.ini

@@ -20,7 +20,8 @@ deps =
        -r{toxinidir}/requirements.txt
        -r{toxinidir}/test-requirements.txt
 commands = find . -type f -name "*.pyc" -delete
-           ostestr {posargs}
+           stestr run '{posargs}'
+           stestr slowest
 whitelist_externals = find
 
 [testenv:pep8]
@@ -69,7 +70,7 @@ commands = sphinx-build -a -E -W -d releasenotes/build/doctrees -b html releasen
 
 [testenv:functional]
 basepython = python3
-commands = ostestr {posargs}
+commands = stestr run '{posargs}'
 setenv =
   {[testenv]setenv}
   OS_TEST_PATH = ./cinderclient/tests/functional