Throw bad request when doc_ids parameter is not an array (or null)
Throw bad request when doc_ids parameter is not an array (or null)

BugzID: 48602

Signed-off-by: Alexander Shorin <287dfd97d2274fe201ae7191a244ba25e475e13a@apache.org>

fkaempfer/couchdb,fkaempfer/couchdb,fkaempfer/couchdb,fkaempfer/couchdb,fkaempfer/couchdb,fkaempfer/couchdb