Release python-tackerclient for Xena-1 milestone

This is a library release for ospython-tackerclient for the Xena-1
milestone. This repo includes commits that have not been releases for
this cycle yet.

If the team is ready to process with this release, please leave a +1
to indicate we should go ahead with the release.

If the team needs more time for things about to merge, or if there is
some other reason a release should not be done at this time, please
leave a -1 with a comment indicating the status. Then update the patch
with the new commit hash to use once the team is ready to do the
release.

$ git log --oneline --no-merges 1.6.0..b5603cc
b5603cc Use assertCountEqual instead of assertItemsEqual
a7ee00e Add Python3 xena unit tests
785c6db Adds support force delete VNFFG
124be38 Fix failing UT in TestListVnfLcmOp

Signed-off-by: Hervé Beraud <hberaud@redhat.com>
Change-Id: If571266fe5839425d33dc3d5d7824f8bfd81fed3

deliverables/xena/python-tackerclient.yaml

@@ -6,3 +6,8 @@ team: tacker
 type: client-library
 repository-settings:
   openstack/python-tackerclient: {}
+releases:
+  - version: 1.7.0
+    projects:
+      - repo: openstack/python-tackerclient
+        hash: b5603cc45cb42d6406d8227b18ac92aac39afccc