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: I084215311928c0e66d45977748e5a2263bbc1444

.gitignore

@@ -35,6 +35,7 @@ pip-delete-this-directory.txt
 # Unit test / coverage reports
 htmlcov/
 .testrepository/
+.stestr/*
 .tox/
 .coverage
 .coverage.*

.stestr.conf

@@ -0,0 +1,3 @@
+[DEFAULT]
+test_path=${TEST_PATH:-./glare/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 ./ ./glare/tests $LISTOPT $IDOPTION
-
-test_id_option=--load-list $IDFILE
-test_list_option=--list

tox.ini

@@ -34,11 +34,14 @@ commands =
   bandit -c bandit.yaml -r glare -n5 -p gate
 
 [testenv:cover]
-basepython = python2.7
-setenv = VIRTUAL_ENV={envdir}
+setenv =
+    {[testenv]setenv}
+    PYTHON=coverage run --source glare --parallel-mode  --omit="*/test*"
 commands =
-    coverage erase
-    python setup.py testr --coverage --testr-args='^(?!.*test.*coverage).*$' --omit="*/test*"
+    stestr run {posargs}
+    coverage combine
+    coverage html -d cover
+    coverage xml -o cover/coverage.xml
 
 [testenv:venv]
 commands = {posargs}