Bug 182695 Backport RowFetchLimit setting in model to 2.1.3
In 2.1.3 Model add new methods DataSetHandle.setDataSetRowLimit() and DataSetHandle.getDataSetRowLimit() to let user define the number of rows that returned from database. This however duplicate with existing 2.2 model methods DataSetHandle.setRowFetchLimit() and DataSetHandle.getRowFetchLimit(). Model should backport the changes to 2.1.3.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/api/DataSetHandle.java
* 
	 * @return handle to the data source, or <code>null</code> if the data
	 *         source is not set or is undefined.
	 */
	public DataSourceHandle getDataSource( )
	{
		return (DataSourceHandle) getElementProperty( ISimpleDataSetModel.DATA_SOURCE_PROP );
	}
	/**
	 * Returns the name of the data source for this data set.
	 * 
	 * @return the data source name as a string
	 * 
	 * @see #setDataSource(String)
	 */
	public String getDataSourceName( )
	{
		return getStringProperty( ISimpleDataSetModel.DATA_SOURCE_PROP );
	}
	/**
	 * Sets the name of the data source for this data set. This method checks
	 * whether the data source name exists in the report design.
	 * 
	 * @param name
	 *            the data source name
	 * @throws SemanticException
	 *             if the data source does not exist in the report design, or
	 *             the property if locked.
	 * @see #getDataSource()
	 */