TST : fix tests because Documents are now iterable
TST : fix tests because Documents are now iterable

@danielballan some of these tests look broken (as is_list
is not updated)

NSLS-II/datamuxer,ericdill/databroker,ericdill/databroker,danielballan/datamuxer,NSLS-II/dataportal,tacaswell/dataportal,tacaswell/dataportal,NSLS-II/dataportal,danielballan/datamuxer,danielballan/dataportal,ericdill/datamuxer,ericdill/datamuxer,danielballan/dataportal