Use standard cover tox env

Change-Id: I4aff1415ef0bbe83ea043388e13e2384b372c7d7

.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

coverage.sh

@@ -1,8 +0,0 @@
-#!/bin/sh
-args=
-if [ -n "$@" ] ; then
-    args="-t $@"
-fi
-python setup.py testr --coverage --slowest "$args"
-python -m coverage report --show-missing
-echo "Coverage generated, see cover/index.html"

tox.ini

@@ -29,7 +29,14 @@ commands = {posargs}
 
 [testenv:cover]
 basepython = python3
-commands = ./coverage.sh {posargs}
+setenv =
+    {[testenv]setenv}
+    PYTHON=coverage run --source solum --parallel-mode
+commands =
+    stestr run {posargs}
+    coverage combine
+    coverage html -d cover
+    coverage xml -o cover/coverage.xml
 
 [testenv:debug]
 basepython = python3