add lower-constraints job

Create a tox environment for running the unit tests against the lower
bounds of the dependencies.

Create a lower-constraints.txt to be used to enforce the lower bounds
in those tests.

Add openstack-tox-lower-constraints job to the zuul configuration.

See http://lists.openstack.org/pipermail/openstack-dev/2018-March/128352.html
for more details.

Change-Id: Id71e1a71a0f9fa342a286ef62c8dc6ca784ae61a
Depends-On: https://review.openstack.org/555034
Signed-off-by: Doug Hellmann <doug@doughellmann.com>

.zuul.yaml

@@ -4,6 +4,10 @@
         - freezer-web-ui-ubuntu-xenial:
             voting: true
 
+        - openstack-tox-lower-constraints
+    gate:
+      jobs:
+        - openstack-tox-lower-constraints
 - job:
     name: freezer-web-ui-ubuntu-xenial
     parent: legacy-dsvm-base

lower-constraints.txt

@@ -0,0 +1,66 @@
+alabaster==0.7.10
+astroid==1.3.8
+Babel==2.5.3
+certifi==2018.1.18
+chardet==3.0.4
+cliff==2.11.0
+cmd2==0.8.1
+colorama==0.3.9
+coverage==4.0
+debtcollector==1.19.0
+Django==1.11
+django-appconf==1.0.2
+django-compressor==2.0
+django-nose==1.4.4
+docutils==0.14
+extras==1.0.0
+fixtures==3.0.0
+flake8==2.5.5
+hacking==0.12.0
+idna==2.6
+imagesize==1.0.0
+iso8601==0.1.12
+Jinja2==2.10
+keystoneauth1==3.4.0
+linecache2==1.0.0
+logilab-common==1.4.1
+MarkupSafe==1.0
+mccabe==0.2.1
+mock==2.0.0
+netaddr==0.7.19
+nose==1.3.7
+nosehtmloutput==0.0.3
+nosexcover==1.0.10
+openstack.nose-plugin==0.7
+oslo.config==5.2.0
+oslo.i18n==3.20.0
+oslosphinx==4.7.0
+pbr==3.1.1
+pep8==1.5.7
+prettytable==0.7.2
+pyflakes==0.8.1
+Pygments==2.2.0
+pylint==1.4.5
+pyparsing==2.2.0
+pyperclip==1.6.0
+python-freezerclient==1.3.0
+python-mimeparse==1.6.0
+python-subunit==1.2.0
+pytz==2018.3
+PyYAML==3.12
+rcssmin==1.0.6
+requests==2.18.4
+rfc3986==1.1.0
+rjsmin==1.0.12
+six==1.11.0
+snowballstemmer==1.2.1
+Sphinx==1.6.2
+sphinxcontrib-websupport==1.0.1
+stevedore==1.28.0
+termcolor==1.1.0
+testrepository==0.0.18
+testtools==2.2.0
+traceback2==1.4.0
+unittest2==1.1.0
+urllib3==1.22
+wrapt==1.10.11

tox.ini

@@ -47,3 +47,10 @@ commands = pylint --rcfile .pylintrc disaster_recovery
 exclude = .venv,.git,.tox,dist,*lib/python*,*egg,build,panel_template,dash_template,local_settings.py,*/local/*,*/test/test_plugins/*,.ropeproject,tools,doc
 max-complexity = 20
 ignore = H405,H404,H403,H401,H238,H306,H701
+
+[testenv:lower-constraints]
+basepython = python3
+deps =
+  -c{toxinidir}/lower-constraints.txt
+  -r{toxinidir}/test-requirements.txt
+  -r{toxinidir}/requirements.txt