Branching for 0.9 releases

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Merged HIVE-2764 into hive9

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Merging in HIVE-2948

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Merging in HIVE-2936

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Merged in HIVE-2910

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HIVE-2930 : Merged in from trunk. Add license to the Hive files (Owen Omalley via Ashutosh Chauhan)

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HIVE-2946 : Merged in from trunk. (Vandana via Ashutosh Chauhan)

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Merged in HIVE-2958 : GROUP BY causing ClassCastException [LazyDioInteger cannot be cast LazyInteger] (navis via hashutosh)

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HIVE-2965 : Revert HIVE-2612 Merged from trunk (hashutosh)

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Missed a diff from previous commit of merging in from HIVE-2965 (hashutosh)

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HIVE-2966 : Revert HIVE-2795 Merged in from trunk. (Thejas Nair via Ashutosh Chauhan)

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HIVE-2970: several jars in hive tar generated are not required. Merged in from trunk. (Thejas Nair via Ashutosh Chauhan)

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HIVE-BUILD. Update Release Notes for 0.9.0 RC1

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Merged in HIVE-2883 : Metastore client doesnt close connection properly (hashutosh)

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HIVE-BUILD. Set version to 0.9.0 (hashutosh)

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HIVE-2646 Hive Ivy dependencies on Hadoop should depend on jars directly, not tarballs. Merged in from trunk. (Andrew Bayer and Thomas Weise)

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HIVE-2976 Fix maven-build Ant target  Merged in from trunk. (Andrew Bayer and Thomas Weise)

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HIVE-2646 : merged in from trunk. Fix for LANG setting for test environment. (Thomas Weise via Ashutosh Chauhan)

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HIVE-2928. Support for Oracle-backed Hive-Metastore (longvarchar to clob in package.jdo)

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HIVE-3082. Oracle Metastore schema script doesn't include DDL for DN internal tables

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