Bug 213126 Add support for DataEngine-leve dataset cache
In many cases the DataEngine-leve dataset cache is useful which ensure that a dataset is executed one time during rendering one report. To support this feature a new dataset property should be added. The Birt customer can choose whether this dataset need to be cached or not by setting the property in deisgn time.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/api/DataSetHandle.java
Iterator bindingIter = paramBindingsPropHandle.iterator( );
			while ( bindingIter.hasNext( ) )
			{
				ParamBindingHandle bindingHandle = (ParamBindingHandle) bindingIter
						.next( );
				if ( oldParamName.equals( bindingHandle.getParamName( ) ) )
				{
					bindingHandle.setParamName( newParamName );
				}
			}
		}
	}
	/**
	 * Sets the max number of rows from data set property value.
	 * 
	 * @param count
	 *            the row number to fetch from result set
	 * 
	 * @throws SemanticException
	 */
	public void setRowFetchLimit( int count ) throws SemanticException
	{
		setIntProperty( ROW_FETCH_LIMIT_PROP, count );
	}
	/**
	 * Returns the max number of rows from data set property value.
	 * 
	 * @return the max number of rows that can be fetched from data set.
	 */
	public int getRowFetchLimit( )