fix schema validation issues for juno

This change was generated with:

sed -i -e 's|version: \(.*\)|version: "\1"|g' deliverables/*/*.yaml

Change-Id: I77ee38765c7d01f04ab84b1b9ed0a913bd366995
Signed-off-by: Doug Hellmann <doug@doughellmann.com>

deliverables/juno/python-cliff.yaml

@@ -2,7 +2,7 @@
 launchpad: python-cliff
 team: OpenStackClient
 releases:
-  - version: 1.7.0
+  - version: "1.7.0"
     projects:
       - repo: openstack/cliff
         hash: 42675b2d7ad93f4bba9c4216874c68b8e5834147