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.

Update the lower bound for PrettyTable so the unit tests pass.

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

Change-Id: Ia146248b505e66adf871d17ae1e4921d7888bb85
Depends-On: https://review.openstack.org/555034
Signed-off-by: Doug Hellmann <doug@doughellmann.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/.zuul.yaml b/.zuul.yaml
index de658d7..bc9aa13 100644
--- a/.zuul.yaml
+++ b/.zuul.yaml
@@ -25,8 +25,10 @@
         - cliff-tox-py27-neutronclient-tip
         - osc-tox-unit-tips:
             branches: ^master$
+        - openstack-tox-lower-constraints
     gate:
       jobs:
         - cliff-tox-py27-neutronclient-tip
         - osc-tox-unit-tips:
             branches: ^master$
+        - openstack-tox-lower-constraints