tox: enable unit tests and fix flake8

This patch enables a tox unit tests job, with a few associated
changes:
* In tox.ini, fix broken py27 env by removing pretty_tox.sh and just
  using stestr directly (also remove some cruft).
* De-empty-fy requirements.txt based on imports in the code
* Clean up test-requirements.txt
* Move tempest tests up a level, since the tests subdirectory is for
  unit tests for this project, not tempest tests to run against an
  OpenStack deployment

Change-Id: I2b258c99bb8d624f8f1aac1fd253d91180856a32

.gitignore

@@ -3,3 +3,4 @@ build
 .eggs
 *.egg-info
 .tox
+.stestr

requirements.txt

@@ -1 +1,5 @@
-
+# The order of packages is significant, because pip processes them in the order
+# of appearance. Changing the order has an impact on the overall integration
+# process, which may cause wedges in the gate later.
+oslo.log
+tempest

rhostest_tempest_plugin/tests/base.py

@@ -0,0 +1,19 @@
+# Copyright 2018 Red Hat
+#
+#    Licensed under the Apache License, Version 2.0 (the "License"); you may
+#    not use this file except in compliance with the License. You may obtain
+#    a copy of the License at
+#
+#         http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+#    License for the specific language governing permissions and limitations
+#    under the License.
+
+from oslotest import base
+
+
+class WhiteboxPluginTestCase(base.BaseTestCase):
+    pass

rhostest_tempest_plugin/tests/test_placeholder.py

@@ -0,0 +1,24 @@
+# Copyright 2018 Red Hat
+#
+#    Licensed under the Apache License, Version 2.0 (the "License"); you may
+#    not use this file except in compliance with the License. You may obtain
+#    a copy of the License at
+#
+#         http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+#    License for the specific language governing permissions and limitations
+#    under the License.
+
+from rhostest_tempest_plugin.tests import base
+
+
+class PlaceholderTestCase(base.WhiteboxPluginTestCase):
+    # TODO(artom) Remove this class when we add actual unit tests. This class
+    # is only necessary to to avoid stestr complaining about not finding any
+    # tests.
+
+    def test_placeholder(self):
+        pass

test-requirements.txt

@@ -1,13 +1,5 @@
 # The order of packages is significant, because pip processes them in the order
 # of appearance. Changing the order has an impact on the overall integration
 # process, which may cause wedges in the gate later.
-hacking<0.12,>=0.11.0 # Apache-2.0
-# needed for doc build
-sphinx!=1.3b1,<1.3,>=1.2.1 # BSD
-python-subunit>=0.0.18 # Apache-2.0/BSD
-oslosphinx!=3.4.0,>=2.5.0 # Apache-2.0
-reno>=1.8.0 # Apache2
-mock>=2.0 # BSD
-coverage>=3.6 # Apache-2.0
-oslotest>=1.10.0 # Apache-2.0
-tempest
+hacking
+oslotest

tox.ini

@@ -1,12 +1,11 @@
 [tox]
-envlist = pep8
+envlist = flake8,py27
 minversion = 2.3.1
 skipsdist = True
 
 [testenv]
 setenv =
     VIRTUAL_ENV={envdir}
-passenv = OS_STDOUT_CAPTURE OS_STDERR_CAPTURE OS_TEST_TIMEOUT OS_TEST_LOCK_PATH TEMPEST_CONFIG TEMPEST_CONFIG_DIR http_proxy HTTP_PROXY https_proxy HTTPS_PROXY no_proxy NO_PROXY
 usedevelop = True
 install_command = pip install -U {opts} {packages}
 whitelist_externals = *
@@ -15,22 +14,12 @@ deps =
     -r{toxinidir}/test-requirements.txt
 commands =
     find . -type f -name "*.pyc" -delete
-    bash tools/pretty_tox.sh '{posargs}'
+    stestr --test-path ./rhostest_tempest_plugin/tests run {posargs}
 
-[testenv:pep8]
+[testenv:flake8]
 commands =
     flake8 {posargs}
-    check-uuid
-
-[hacking]
-local-check-factory = tempest.hacking.checks.factory
-import_exceptions = tempest.services
 
 [flake8]
-# E125 is a won't fix until https://github.com/jcrocholl/pep8/issues/126 is resolved.  For further detail see https://review.openstack.org/#/c/36788/
-# E123 skipped because it is ignored by default in the default pep8
-# E129 skipped because it is too limiting when combined with other rules
-# Skipped because of new hacking 0.9: H405
-ignore = E125,E123,E129
 show-source = True
-exclude = .git,.venv,.tox,dist,doc,openstack,*egg,test_nova_manage_archive.py
+exclude = .git,.venv,.tox,dist,doc,*egg