add lower-constraints job5.0.0

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: Ief8bbf14effa1266c62c4600f889a18f1fdbde32
Depends-On: https://review.openstack.org/555034
Signed-off-by: Doug Hellmann <doug@doughellmann.com>

1 files changed, 8 insertions, 0 deletions

diff --git a/tox.ini b/tox.ini
index 1292b2e..96b843e 100644
--- a/tox.ini
+++ b/tox.ini
@@ -68,3 +68,11 @@ import_exceptions =
 extensions = .rst, .yaml
 # lines should not be longer than 79 characters.
 max-line-length = 79
+
+[testenv:lower-constraints]
+basepython = python3
+deps =
+  -c{toxinidir}/lower-constraints.txt
+  -r{toxinidir}/test-requirements.txt
+  -r{toxinidir}/requirements.txt
+  .[audit_notifications]