Uncap jsonschema
Uncap jsonschema

Reference commit:
https://review.openstack.org/#/c/649799/
https://review.openstack.org/#/c/649669/2/global-requirements.txt

Change-Id: I01a056ee6ce89ec0416290de84b0043126aa668f

stackforge/watcher,openstack/watcher,openstack/watcher,stackforge/watcher