PIG-259: allow store to overwrite existing directroy

git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1564451 13f79535-47bb-0310-9956-ffa450edef68
PIG-3744: SequenceFileLoader does not support BytesWritable (rohini)

git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1564474 13f79535-47bb-0310-9956-ffa450edef68
PIG-3741: Utils.setTmpFileCompressionOnConf can cause side effect for SequenceFileInterStorage (aniket486)

git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1564530 13f79535-47bb-0310-9956-ffa450edef68
PIG-259: allow store to overwrite existing directroy (PIG-259.9.patch)

git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1564564 13f79535-47bb-0310-9956-ffa450edef68
PIG-259: allow store to overwrite existing directroy (PIG-259.9.patch)

git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1564603 13f79535-47bb-0310-9956-ffa450edef68
PIG-3623: HBaseStorage: setting loadKey and noWAL to false doesn't have any affect (nezihyigitbasi via rohini)

git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1564615 13f79535-47bb-0310-9956-ffa450edef68