key_rev_value: Add a test for returning headers
key_rev_value: Add a test for returning headers

milimetric/restbase,wikimedia/mediawiki-services-restbase,milimetric/restbase,d00rman/restbase,Pchelolo/restbase,d00rman/restbase,wikimedia/restbase,cscott/restbase,cscott/restbase,wikimedia/restbase,Pchelolo/restbase,wikimedia/mediawiki-services-restbase