HIVE-4920 PTest2 handle Spot Price increases gracefully and improve rsync paralllelsim (Brock Noland via egc)

Submitted by:	Brock Noland
Reviewed by:	Edward Capriolo


git-svn-id: https://svn.apache.org/repos/asf/hive/trunk@1508707 13f79535-47bb-0310-9956-ffa450edef68