HiveAccumuloHelper getHelper() {
    return helper;
  }
Create col fam/qual pairs from pipe separated values, usually from config object. Ignores
rowID.

@param columnMappings
         The list of ColumnMappings for the given query
@return a Set of Pairs of colfams and colquals
accumulo-handler/src/java/org/apache/hadoop/hive/accumulo/mr/HiveAccumuloTableInputFormat.java