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: Ic28558ee6481d49a9b4e5dc2c4182504e330448f
Signed-off-by: Doug Hellmann <doug@doughellmann.com>
Co-Authored-by: Eric Fried <efried@us.ibm.com>
Co-Authored-by: Jim Rollenhagen <jim@jimrollenhagen.com>

.zuul.yaml

@@ -125,12 +125,14 @@
         - nova-next
         - nova-tox-functional
         - nova-tox-functional-py35
+        - openstack-tox-lower-constraints
     gate:
       jobs:
         - nova-cells-v1
         - nova-next
         - nova-tox-functional
         - nova-tox-functional-py35
+        - openstack-tox-lower-constraints
     experimental:
       jobs:
         - nova-caching-scheduler

lower-constraints.txt

@@ -0,0 +1,172 @@
+alembic==0.9.8
+amqp==2.2.2
+appdirs==1.4.3
+asn1crypto==0.24.0
+attrs==17.4.0
+automaton==1.14.0
+Babel==2.3.4
+enum34==1.0.4
+bandit==1.1.0
+bcrypt==3.1.4
+cachetools==2.0.1
+castellan==0.16.0
+certifi==2018.1.18
+cffi==1.11.5
+chardet==3.0.4
+cliff==2.11.0
+cmd2==0.8.1
+colorama==0.3.9
+contextlib2==0.5.5
+coverage==4.0
+cryptography==2.1
+cursive==0.2.1
+ddt==1.0.1
+debtcollector==1.19.0
+decorator==3.4.0
+deprecation==2.0
+dogpile.cache==0.6.5
+enum-compat==0.0.2
+eventlet==0.18.2
+extras==1.0.0
+fasteners==0.14.1
+fixtures==3.0.0
+flake8==2.5.5
+future==0.16.0
+futurist==1.6.0
+gabbi==1.35.0
+gitdb2==2.0.3
+GitPython==2.1.8
+greenlet==0.4.10
+hacking==0.12.0
+idna==2.6
+iso8601==0.1.11
+Jinja2==2.10
+jmespath==0.9.3
+jsonpatch==1.21
+jsonpath-rw-ext==1.1.3
+jsonpath-rw==1.4.0
+jsonpointer==2.0
+jsonschema==2.6.0
+keystoneauth1==3.4.0
+keystonemiddleware==4.17.0
+kombu==4.1.0
+linecache2==1.0.0
+lxml==3.4.1
+Mako==1.0.7
+MarkupSafe==1.0
+mccabe==0.2.1
+microversion-parse==0.2.1
+mock==2.0.0
+monotonic==1.4
+mox3==0.20.0
+msgpack==0.5.6
+munch==2.2.0
+netaddr==0.7.18
+netifaces==0.10.4
+networkx==1.11
+numpy==1.14.2
+openstacksdk==0.12.0
+os-brick==2.4.0
+os-client-config==1.29.0
+os-service-types==1.2.0
+os-traits==0.4.0
+os-vif==1.7.0
+os-win==3.0.0
+os-xenapi==0.3.1
+osc-lib==1.10.0
+oslo.cache==1.26.0
+oslo.concurrency==3.26.0
+oslo.config==5.2.0
+oslo.context==2.19.2
+oslo.db==4.27.0
+oslo.i18n==3.15.3
+oslo.log==3.36.0
+oslo.messaging==5.29.0
+oslo.middleware==3.31.0
+oslo.policy==1.30.0
+oslo.privsep==1.23.0
+oslo.reports==1.18.0
+oslo.rootwrap==5.8.0
+oslo.serialization==2.18.0
+oslo.service==1.24.0
+oslo.utils==3.33.0
+oslo.versionedobjects==1.31.2
+oslo.vmware==2.17.0
+oslotest==3.2.0
+osprofiler==1.4.0
+packaging==17.1
+paramiko==2.0.0
+Paste==2.0.2
+PasteDeploy==1.5.0
+pbr==2.0.0
+pep8==1.5.7
+pika-pool==0.1.3
+pika==0.10.0
+pluggy==0.6.0
+ply==3.11
+prettytable==0.7.1
+psutil==3.2.2
+psycopg2==2.6.2
+py==1.5.2
+pyasn1-modules==0.2.1
+pyasn1==0.4.2
+pycadf==2.7.0
+pycparser==2.18
+pyflakes==0.8.1
+pyinotify==0.9.6
+PyMySQL==0.7.6
+PyNaCl==1.2.1
+pyOpenSSL==17.5.0
+pyparsing==2.2.0
+pyperclip==1.6.0
+pypowervm==1.1.15
+pyroute2==0.4.21
+pytest==3.4.2
+python-barbicanclient==4.5.2
+python-cinderclient==3.3.0
+python-dateutil==2.5.3
+python-editor==1.0.3
+python-glanceclient==2.8.0
+python-ironicclient==2.3.0
+python-keystoneclient==3.15.0
+python-mimeparse==1.6.0
+python-neutronclient==6.7.0
+python-subunit==1.2.0
+pytz==2018.3
+PyYAML==3.12
+repoze.lru==0.7
+requests-mock==1.2.0
+requests==2.14.2
+requestsexceptions==1.4.0
+retrying==1.3.3
+rfc3986==0.3.1
+Routes==2.3.1
+simplejson==3.13.2
+six==1.10.0
+smmap2==2.0.3
+sqlalchemy-migrate==0.11.0
+SQLAlchemy==1.0.10
+sqlparse==0.2.4
+statsd==3.2.2
+stestr==1.0.0
+stevedore==1.20.0
+setuptools==21.0.0
+suds-jurko==0.6
+taskflow==2.16.0
+Tempita==0.5.2
+tenacity==4.9.0
+testrepository==0.0.20
+testresources==2.0.0
+testscenarios==0.4
+testtools==2.2.0
+tooz==1.58.0
+traceback2==1.4.0
+unittest2==1.1.0
+urllib3==1.22
+vine==1.1.4
+voluptuous==0.11.1
+warlock==1.3.0
+WebOb==1.7.1
+websockify==0.8.0
+wrapt==1.10.11
+wsgi-intercept==1.4.1

tox.ini

@@ -237,3 +237,13 @@ commands=pip-missing-reqs -d --ignore-file=nova/tests/* --ignore-file=nova/test.
 deps = bindep
 commands = bindep test
 usedevelop = False
+
+[testenv:lower-constraints]
+basepython = python3
+deps =
+  -c{toxinidir}/lower-constraints.txt
+  -r{toxinidir}/test-requirements.txt
+  -r{toxinidir}/requirements.txt
+commands =
+    {[testenv]commands}
+    stestr run --blacklist-file=tests-py3.txt {posargs}