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

Change-Id: I0b5b080be1fefc8de28f40a4afced16608964b2c
Signed-off-by: Charles Short <zulcss@gmail.com>

lower-constraints.txt

@@ -17,7 +17,7 @@ debtcollector==1.19.0
 decorator==4.2.1
 deprecation==2.0
 doc8==0.6.0
-docker==3.1.4
+docker==2.4.2
 docker-pycreds==0.2.2
 docutils==0.11
 dogpile.cache==0.6.5
@@ -56,29 +56,29 @@ openstacksdk==0.12.0
 os-client-config==1.29.0
 os-service-types==1.2.0
 os-testr==1.0.0
-osc-lib==1.10.0
+osc-lib==1.8.0
 oslo.concurrency==3.25.0
 oslo.config==5.2.0
 oslo.context==2.20.0
-oslo.i18n==3.20.0
-oslo.log==3.37.0
+oslo.i18n==3.15.3
+oslo.log==3.36.0
 oslo.messaging==5.29.0
 oslo.middleware==3.31.0
 oslo.serialization==2.25.0
 oslo.service==1.24.0
-oslo.utils==3.36.0
+oslo.utils==3.33.0
 oslotest==3.2.0
 osprofiler==1.4.0
 packaging==17.1
 paramiko==2.0.0
 Paste==2.0.2
 PasteDeploy==1.5.0
-pbr==3.1.1
+pbr==2.0.0
 pep8==1.5.7
 pika==0.10.0
 pika-pool==0.1.3
 positional==1.2.1
-prettytable==0.7.2
+prettytable==0.7.1
 pyasn1==0.1.8
 pycparser==2.18
 pyflakes==0.8.1
@@ -92,7 +92,7 @@ python-glanceclient==2.9.1
 python-keystoneclient==3.15.0
 python-mimeparse==1.6.0
 python-novaclient==10.1.0
-python-openstackclient==3.14.0
+python-openstackclient==3.12.0
 python-subunit==1.0.0
 pytz==2018.3
 PyYAML==3.12
@@ -106,7 +106,7 @@ simplejson==3.13.2
 six==1.11.0
 smmap==0.9.0
 statsd==3.2.1
-stestr==1.0.0
+stestr==2.0.0
 stevedore==1.28.0
 tempest==17.1.0
 tenacity==3.2.1
@@ -120,5 +120,5 @@ urllib3==1.22
 vine==1.1.4
 warlock==1.3.0
 WebOb==1.7.1
-websocket-client==0.47.0
+websocket-client==0.44.0
 wrapt==1.10.11

test-requirements.txt

@@ -9,7 +9,7 @@ ddt>=1.0.1 # MIT
 hacking!=0.13.0,<0.14,>=0.12.0 # Apache-2.0
 oslotest>=3.2.0 # Apache-2.0
 osprofiler>=1.4.0 # Apache-2.0
-os-testr>=1.0.0 # Apache-2.0
+stestr>=2.0.0
 python-subunit>=1.0.0 # Apache-2.0/BSD
 tempest>=17.1.0 # Apache-2.0
 testresources>=2.0.0 # Apache-2.0/BSD

tools/pretty_tox.sh

@@ -1,16 +0,0 @@
-#!/usr/bin/env bash
-
-set -o pipefail
-
-TESTRARGS=$1
-
-# --until-failure is not compatible with --subunit see:
-#
-# https://bugs.launchpad.net/testrepository/+bug/1411804
-#
-# this work around exists until that is addressed
-if [[ "$TESTARGS" =~ "until-failure" ]]; then
-    python setup.py testr --slowest --testr-args="$TESTRARGS"
-else
-    python setup.py testr --slowest --testr-args="--subunit $TESTRARGS" | subunit-trace -f
-fi

tox.ini

@@ -17,7 +17,8 @@ deps = -r{toxinidir}/requirements.txt
 
 commands =
   find . -type f -name "*.py[c|o]" -delete
-  bash tools/pretty_tox.sh '{posargs}'
+  stestr run {posargs}
+  stestr slowest
 
 
 [testenv:bandit]
@@ -80,7 +81,7 @@ exclude=.venv,.git,.tox,dist,doc,*lib/python*,*egg,build
 import_exceptions = zunclient._i18n
 
 [testenv:functional]
-commands = 
+commands =
     find . -type f -name "*.py[c|o]" -delete
     ostestr {posargs}
 setenv =