Release python-keystonclient 3.18.0

This is the Stein milestone-1 release for python-keystonclient to
release merged commits since the last release.

See [1] for more details on the new cycle-with-intermediary library
release changes.

[1] http://lists.openstack.org/pipermail/openstack-dev/2018-October/135689.html

We plan on processing this release November 1 unless we are told to hold
off, or earlier if we get a +1 from the PTL and/or release liaison
indicating that it is all clear to proceed.

Change-Id: I6655313626d1ac0e4816f3e27c6c7fbcf18be02b
Signed-off-by: Sean McGinnis <sean.mcginnis@gmail.com>

deliverables/stein/python-keystoneclient.yaml

@@ -6,3 +6,8 @@ team: keystone
 type: client-library
 repository-settings:
   openstack/python-keystoneclient: {}
+releases:
+  - projects:
+      - hash: 8982841b637b1ce64af5134b628df515ab6d3afa
+        repo: openstack/python-keystoneclient
+    version: 3.18.0