PIG-3248: Upgrade hadoop-2.0.0-alpha to hadoop-2.0.3-alpha

git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1457991 13f79535-47bb-0310-9956-ffa450edef68
PIG-3132:  NPE when illustrating a relation with HCatLoader (check in missing UDFContextTestLoaderWithSignature.java)

git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1458036 13f79535-47bb-0310-9956-ffa450edef68
PIG-3172: Partition filter push down does not happen when there is a non partition key map column filter (rohini)

git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1458038 13f79535-47bb-0310-9956-ffa450edef68
PIG-3218: Add support for biginteger/bigdecimal type in Groovy UDFs

git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1458063 13f79535-47bb-0310-9956-ffa450edef68
PIG-3217: Add support for DateTime type in Groovy UDFs

git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1458066 13f79535-47bb-0310-9956-ffa450edef68
Merge branch 'trunk' of https://github.com/apache/pig into trunk