tests: replace .testr.conf with .stestr.conf

TrivialFix:In the change[1] os_testr changed under the covers
from using testr to stestr, so that we now get the following
warning:
   ostestr.py:120:
   UserWarning: No .stestr.conf file found in the CWD.
   Please create one to to replace the .testr.conf. You
   can find a script to do this in the stestr git repository.
So remove the .testr.conf and add .stestr.conf which was
generated using a utility script as documented here [2].
[1] Id7cb2a39a8308f1413608dcf19273a1d7f33592e
[2] https://media.readthedocs.org/pdf/stestr/stable/stestr.pdf

Change-Id: I4810ac86aeca23e5abff3dc0417ffa3aa2f3a199

.gitignore

@@ -1,10 +1,11 @@
 *.pyc
 *.log
 .glance-venv
-.venv
+.stestr/*
 .testrepository/
 .tox
 .coverage*
+.venv
 cover/*
 covhtml
 nosetests.xml

.stestr.conf

@@ -0,0 +1,3 @@
+[DEFAULT]
+test_path=${TEST_PATH:-./glance/tests}
+top_dir=./

.testr.conf

@@ -1,8 +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:-160} \
-             ${PYTHON:-python} -m subunit.run discover -t ./ ${OS_TEST_PATH:-./glance/tests} $LISTOPT $IDOPTION
-
-test_id_option=--load-list $IDFILE
-test_list_option=--list

tox.ini

@@ -24,7 +24,6 @@ install_command = pip install -c{env:UPPER_CONSTRAINTS_FILE:https://git.openstac
 deps = -r{toxinidir}/test-requirements.txt
 commands =
     bandit: bandit -c bandit.yaml -r glance -n5 -p gate
-    cover: python setup.py testr --coverage --testr-args='^(?!.*test.*coverage).*$'
     debug: oslo_debug_helper {posargs}
     debug{-py27,-py35}: oslo_debug_helper {posargs}
     docs: python setup.py build_sphinx
@@ -43,6 +42,16 @@ commands = ostestr --slowest {posargs}
 # conditionals in [testenv], use separate environment.
 commands = ostestr --slowest {posargs}
 
+[testenv:cover]
+setenv =
+    {[testenv]setenv}
+    PYTHON=coverage run --source glance --parallel-mode
+commands =
+    stestr run {posargs}
+    coverage combine
+    coverage html -d cover
+    coverage xml -o cover/coverage.xml
+
 [testenv:pep8]
 commands =
   flake8 {posargs}