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 dependencies needed to make the unit tests pass while
constrained to the lower bounds.

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: I2a8f465c8b08370517cbec857933b08fca94ca38
Depends-On: https://review.openstack.org/555034
Signed-off-by: Doug Hellmann <doug@doughellmann.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/setup.cfg b/setup.cfg
index e4963db..f20bbca 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -34,7 +34,7 @@ data_files =
 
 [extras]
 keystone =
-    python-keystoneclient>=0.7.0
+  python-keystoneclient>=3.8.0 # Apache-2.0
 
 [entry_points]
 console_scripts =