Add [extra][etag] to metadata
Add [extra][etag] to metadata

kwierman/waterbutler,Johnetordoff/waterbutler,TomBaxter/waterbutler,RCOSDP/waterbutler,cosenal/waterbutler,felliott/waterbutler,rdhyee/waterbutler,Ghalko/waterbutler,icereval/waterbutler,chrisseto/waterbutler,hmoco/waterbutler,CenterForOpenScience/waterbutler,rafaeldelucena/waterbutler