Update TOX_CONSTRAINTS_FILE for stable/xena

Update the URL to the upper-constraints file to point to the redirect
rule on releases.openstack.org so that anyone working on this branch
will switch to the correct upper-constraints list automatically when
the requirements repository branches.

Until the requirements repository has as stable/xena branch, tests will
continue to use the upper-constraints list on master.

Change-Id: I7b1e1213d5ceb67c44b3899bc3e0fea16f17ee9d

1 files changed, 1 insertions, 1 deletions

diff --git a/tox.ini b/tox.ini
index 52bea255..11cace3a 100644
--- a/tox.ini
+++ b/tox.ini
@@ -13,7 +13,7 @@ setenv = VIRTUAL_ENV={envdir}
 
 usedevelop = True
 install_command = pip install \
-                  -c{env:TOX_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master} \
+                  -c{env:TOX_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/xena} \
                   -U {opts} {packages}
 deps = -r{toxinidir}/requirements.txt
        -r{toxinidir}/test-requirements.txt