private static Path getPlanPath(Configuration conf, String name) {
    Path planPath = getPlanPath(conf);
    if (planPath == null) {
      return null;
    }
    return new Path(planPath, name);
  }
Returns the Map or Reduce plan
Side effect: the BaseWork returned is also placed in the gWorkMap
@param conf
@param name
@return BaseWork based on the name supplied will return null if name is null
@throws RuntimeException if the configuration files are not proper or if plan can not be loaded
ql/src/java/org/apache/hadoop/hive/ql/exec/Utilities.java