PIG-3313: pig job hang if the job tracker is bounced during execution

git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1486224 13f79535-47bb-0310-9956-ffa450edef68
PIG-3328: DataBags created with an initial list of tuples don't get registered as spillable

git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1486226 13f79535-47bb-0310-9956-ffa450edef68
PIG-3335 TestErrorHandling.tesNegative7 fails on MR2

git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1486235 13f79535-47bb-0310-9956-ffa450edef68
Merge remote branch 'origin/trunk' into trunk