PIG-3553 - fix unit test  (jeremykarn via cheolsoo)


git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1543887 13f79535-47bb-0310-9956-ffa450edef68
PIG-3582: Document SUM, MIN, MAX, and AVG functions for BigInteger and BigDecimal (harichinnan via cheolsoo)


git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1543900 13f79535-47bb-0310-9956-ffa450edef68