2.6. Patch information for HCatalog

HCatalog is based on Apache HCatalog 0.5.0 and includes the following:

HCATALOG-624: Fix HCatalog for for Hadoop 2.0.
HCATALOG-555: HCatalog script should look for hcatalog-core JAR file and add HCAT_PREFIX/conf as a config location that is checked.
HCATALOG-573: Removed version number from WEBHCAT_JAR in webhcat_config.sh.
HCATALOG-631: Fixed HBase end to endtests on single nodes on Hadoop 2.0.3 when dfs.client.read.shortcircuit is enabled for HBase.