Store the Vary header per page that we get from Parsoid
Store the Vary header per page that we get from Parsoid

Change-Id: I7b15faa01e25d91aea13d43ffc3b2fac89082163

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