Handle possible exceptions when fetching version numbers
Handle possible exceptions when fetching version numbers

This hardens the feature slightly.

Change-Id: I32d92849856e602d4d22390f3bfc72f6a971f4c2

openstack/openstackdocstheme,openstack/openstackdocstheme,openstack/openstackdocstheme,openstack/openstackdocstheme