Add client config to keep fields of table magic in query order

Currently the fields in table magic are sorted by field name by default, but in many scenarios, we want to keep fields of table magic in query order, for example:

val result = spark.sql("select b, a from table")
%table result

currently Livy responses json with fields in the order of "a", "b", but we want them in the order of "b", "a" which is consistent with the SQL