Summary: Used codemod to modify all references to eden/fs/store/BlobMetadata.h. Changed them to eden/fs/model/BlobMetadata.h and moved the file to the model director
Reviewed By: genevievehelsel
Differential Revision: D32397203
fbshipit-source-id: 0c17b96d1aa33ba32fefe43ea5c29a645c577765