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.

Co-Authored-By: Nguyen Hai <nguyentrihai93@gmail.com>
Change-Id: Icf6c2b0ced6dc75496a4c9e81eb1492342095c3b
Depends-On: https://review.openstack.org/555034
Signed-off-by: Doug Hellmann <doug@doughellmann.com>

.zuul.yaml

@@ -0,0 +1,7 @@
+- project:
+    check:
+      jobs:
+        - openstack-tox-lower-constraints
+    gate:
+      jobs:
+        - openstack-tox-lower-constraints

lower-constraints.txt

@@ -0,0 +1,91 @@
+alabaster==0.7.10
+appdirs==1.4.3
+Babel==2.5.3
+certifi==2018.1.18
+chardet==3.0.4
+cliff==2.11.0
+cmd2==0.8.2
+colorama==0.3.9
+coverage==4.0
+debtcollector==1.19.0
+decorator==4.2.1
+deprecation==2.0
+Django==1.11
+django-nose==1.4.4
+docutils==0.11
+dogpile.cache==0.6.5
+dulwich==0.15.0
+extras==1.0.0
+fixtures==3.0.0
+flake8==2.5.5
+hacking==0.12.0
+idna==2.6
+imagesize==0.7.1
+iso8601==0.1.12
+Jinja2==2.10
+jmespath==0.9.3
+jsonpatch==1.21
+jsonpointer==2.0
+keystoneauth1==3.4.0
+linecache2==1.0.0
+MarkupSafe==1.0
+mccabe==0.2.1
+mock==2.0.0
+monotonic==1.4
+mox3==0.20.0
+msgpack==0.5.6
+msgpack-python==0.4.0
+munch==2.2.0
+netaddr==0.7.19
+netifaces==0.10.6
+nodeenv==0.9.4
+nose==1.3.7
+nose-exclude==0.3.0
+nosehtmloutput==0.0.3
+nosexcover==1.0.10
+openstack.nose-plugin==0.7
+openstacksdk==0.12.0
+os-client-config==1.29.0
+os-service-types==1.2.0
+osc-lib==1.10.0
+oslo.config==5.2.0
+oslo.context==2.20.0
+oslo.i18n==3.20.0
+oslo.log==3.36.0
+oslo.serialization==2.25.0
+oslo.utils==3.36.0
+oslosphinx==4.7.0
+packaging==17.1
+pbr==2.0.0
+pep8==1.5.7
+positional==1.2.1
+prettytable==0.7.2
+pyflakes==0.8.1
+Pygments==2.2.0
+pyinotify==0.9.6
+pyparsing==2.2.0
+pyperclip==1.6.0
+python-dateutil==2.7.0
+python-keystoneclient==3.15.0
+python-mimeparse==1.6.0
+python-tackerclient==0.8.0
+pytz==2018.3
+PyYAML==3.12
+reno==2.5.0
+requests==2.18.4
+requestsexceptions==1.4.0
+rfc3986==1.1.0
+selenium==2.50.1
+simplejson==3.13.2
+six==1.11.0
+snowballstemmer==1.2.1
+Sphinx==1.6.5
+sphinxcontrib-websupport==1.0.1
+stevedore==1.28.0
+termcolor==1.1.0
+testtools==2.2.0
+traceback2==1.4.0
+unittest2==1.1.0
+urllib3==1.22
+wrapt==1.10.11
+xvfbwrapper==0.1.3

requirements.txt

@@ -10,3 +10,8 @@
 oslo.log>=3.36.0 # Apache-2.0
 pbr!=2.1.0,>=2.0.0 # Apache-2.0
 python-tackerclient>=0.8.0 # Apache-2.0
+
+# This will be installed from git in OpenStack CI if the job setting
+# required-projects for horizon:
+horizon>=13.0.0 # Apache-2.0
+

test-requirements.txt

@@ -10,6 +10,7 @@
 hacking!=0.13.0,<0.14,>=0.12.0 # Apache-2.0
 #
 coverage!=4.4,>=4.0 # Apache-2.0
+Django<2.0,>=1.11 # BSD
 django-nose>=1.4.4 # BSD
 mock>=2.0.0 # BSD
 mox3>=0.20.0 # Apache-2.0

tox.ini

@@ -52,3 +52,10 @@ max-complexity = 20
 commands =
     pybabel extract -F babel-django.cfg -o tacker_horizon/locale/django.pot -k gettext_noop -k gettext_lazy -k ngettext_lazy:1,2 -k ugettext_noop -k ugettext_lazy -k ungettext_lazy:1,2 -k npgettext:1c,2,3 -k pgettext_lazy:1c,2 -k npgettext_lazy:1c,2,3 tacker_horizon
     pybabel extract -F babel-djangojs.cfg -o tacker_horizon/locale/djangojs.pot -k gettext_noop -k gettext_lazy -k ngettext_lazy:1,2 -k ugettext_noop -k ugettext_lazy -k ungettext_lazy:1,2 -k npgettext:1c,2,3 -k pgettext_lazy:1c,2 -k npgettext_lazy:1c,2,3 tacker_horizon
+
+[testenv:lower-constraints]
+basepython = python3
+deps =
+  -c{toxinidir}/lower-constraints.txt
+  -r{toxinidir}/test-requirements.txt
+  -r{toxinidir}/requirements.txt