Bug 192829 Aggregation binding filter doesn't work for crosstab
The filter condition on bindings for Crosstab doesn't take effect. Currently Dte hasn't supported this yet.
data/org.eclipse.birt.data/src/org/eclipse/birt/data/engine/olap/data/api/CubeQueryExecutorHelper.java
{
	Object[] levelKey;
	MultiKey( Object[] key )
	{
		this.levelKey = key;
	}
	/*
	 * (non-Javadoc)
	 * @see java.lang.Comparable#compareTo(T)
	 */
	public int compareTo( Object obj )
	{
		if ( obj == null )
			return -1;
		else if ( obj instanceof MultiKey )
		{
			MultiKey key = (MultiKey) obj;
			return CompareUtil.compare( levelKey, key.levelKey );
		}
		return -1;
	}
}
/**
 * 
 *
 */
class AggrFilter