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: I2aa9180e116b4dec9258e07cea98d0bdf67b8a4e
Depends-On: https://review.openstack.org/555034
Signed-off-by: Doug Hellmann <doug@doughellmann.com>

.zuul.yaml

@@ -6,3 +6,4 @@
       - check-requirements
       - publish-openstack-docs-pti
       - release-notes-jobs-python3
+      - openstack-lower-constraints-jobs

lower-constraints.txt

@@ -0,0 +1,83 @@
+anyjson==0.3.3
+appdirs==1.3.0
+asn1crypto==0.23.0
+Babel==2.3.4
+cffi==1.7.0
+cliff==2.8.0
+cmd2==0.8.0
+coverage==4.0
+cryptography==2.1
+debtcollector==1.2.0
+decorator==3.4.0
+deprecation==1.0
+dogpile.cache==0.6.2
+extras==1.0.0
+fixtures==3.0.0
+flake8==2.5.5
+hacking==0.12.0
+idna==2.6
+iso8601==0.1.11
+Jinja2==2.10
+jmespath==0.9.0
+jsonpatch==1.16
+jsonpointer==1.13
+jsonschema==2.6.0
+keystoneauth1==3.4.0
+linecache2==1.0.0
+MarkupSafe==1.0
+mccabe==0.2.1
+mock==2.0.0
+monotonic==0.6
+msgpack-python==0.4.0
+munch==2.1.0
+netaddr==0.7.18
+netifaces==0.10.4
+openstacksdk==0.11.2
+os-apply-config==5.0.0
+os-client-config==1.28.0
+os-service-types==1.2.0
+osc-lib==1.8.0
+oslo.config==5.2.0
+oslo.i18n==3.15.3
+oslo.serialization==2.18.0
+oslo.utils==3.33.0
+paunch==4.0.0
+pbr==2.0.0
+pep8==1.5.7
+positional==1.2.1
+prettytable==0.7.2
+pycparser==2.18
+pycrypto==2.6
+pyflakes==0.8.1
+pyOpenSSL==17.1.0
+pyparsing==2.1.0
+pyperclip==1.5.27
+pystache==0.5.4
+python-cinderclient==3.3.0
+python-glanceclient==2.8.0
+python-heatclient==1.10.0
+python-keystoneclient==3.8.0
+python-mimeparse==1.6.0
+python-novaclient==9.1.0
+python-openstackclient==3.12.0
+python-subunit==1.0.0
+python-swiftclient==3.2.0
+pytz==2013.6
+PyYAML==3.12
+pyzmq==14.3.1
+requests==2.14.2
+requests-mock==1.1.0
+requestsexceptions==1.2.0
+rfc3986==0.3.1
+salt==2017.7.4
+simplejson==3.5.1
+six==1.10.0
+stevedore==1.20.0
+testrepository==0.0.18
+testscenarios==0.4
+testtools==2.2.0
+tornado==4.4.3
+traceback2==1.4.0
+unittest2==1.1.0
+warlock==1.2.0
+wrapt==1.7.0

test-requirements.txt

@@ -6,7 +6,7 @@ fixtures>=3.0.0 # Apache-2.0/BSD
 # Hacking already pins down pep8, pyflakes and flake8
 hacking!=0.13.0,<0.14,>=0.12.0 # Apache-2.0
 mock>=2.0.0 # BSD
-paunch>=1.0.0 # Apache-2.0
+paunch>=4.0.0 # Apache-2.0
 requests>=2.14.2 # Apache-2.0
 requests-mock>=1.1.0 # Apache-2.0
 salt>=2017.7.4 # Apache-2.0

tox.ini

@@ -33,3 +33,10 @@ exclude=.venv,.git,.tox,*lib/python*,private,.eggs
 basepython = python3
 deps = -r{toxinidir}/doc/requirements.txt
 commands = sphinx-build -a -E -W -d releasenotes/build/doctrees -b html releasenotes/source releasenotes/build/html
+
+[testenv:lower-constraints]
+basepython = python3
+deps =
+  -c{toxinidir}/lower-constraints.txt
+  -r{toxinidir}/test-requirements.txt
+  -r{toxinidir}/requirements.txt