Fix incorrect run command and add stestr config file.

* update tox.ini with stestr command
  * added .stestr.conf file
  * update .gitignore and test-requirements.txt

Change-Id: I5883533eb4d72fc6cc53fab591845189e15e72dc

.gitignore

@@ -29,6 +29,7 @@ cover/
 nosetests.xml
 .testrepository
 .venv
+.stestr
 
 # Translations
 *.mo

.stestr.conf

@@ -0,0 +1,3 @@
+[DEFAULT]
+test_path=${OS_TEST_PATH:-./glance_tempest_plugin}
+top_dir=./

test-requirements.txt

@@ -7,5 +7,5 @@ hacking>=3.0.1,<3.1 # Apache-2.0
 coverage!=4.4,>=4.0 # Apache-2.0
 python-subunit>=1.0.0 # Apache-2.0/BSD
 oslotest>=3.2.0 # Apache-2.0
-testrepository>=0.0.18 # Apache-2.0/BSD
+stestr>=2.0.0 # Apache-2.0/BSD
 testtools>=2.2.0 # MIT

tox.ini

@@ -14,7 +14,7 @@ setenv =
    PYTHONWARNINGS=default::DeprecationWarning
 deps = -c{env:TOX_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master}
        -r{toxinidir}/test-requirements.txt
-commands = python setup.py test --slowest --testr-args='{posargs}'
+commands = stestr run --slowest {posargs}
 
 [testenv:pep8]
 commands = flake8 {posargs}