1. add a concurrent hash map patch for hive serde2; 2. minimize the hyracks cc history size
1. add a concurrent hash map patch for hive serde2; 2. minimize the hyracks cc history size

git-svn-id: b6a9c85071c7aeab1d01573b296c678ee8e9a01b@3118 123451ca-8445-de46-9d55-352943316053

pregelix/pregelix,pregelix/pregelix,sigmod/asterixdb-analytics,sigmod/asterixdb-analytics