Check for empty JSON translation files
Check for empty JSON translation files

JSON translation files do not contain the "msgid" string and are
currently being removed during commit filtering. This runs a different
check for JSON files, ensuring it contains string keys.

Change-Id: Ic5e628beb7301586cc1a4dbe441b187989ca68b4

openstack-infra/project-config,openstack-infra/project-config