create entity w/ non-insertable columns (bug #1610)
create entity w/ non-insertable columns (bug #1610)

Before creating an entity, check if the user does not have permission to
insert into any column. Add non-insertable columns to the 'defaults'
argument for the request.

informatics-isi-edu/ermrestjs,informatics-isi-edu/ermrestjs,informatics-isi-edu/ermrestjs