Bug 121498 When datasource/dataset deleted, the datasource/dataset property binding element haven't been deleted
When deleted the datasource/dataset, the datasource/dataset property binding element haven't been deleted. Expected result: This operation must be a transaction.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/api/DesignElementHandle.java
{
		
		DesignElement element = getElement( );
		PropertyCommand cmd = new PropertyCommand( module, element );
		cmd.setProperty( propName, value );
	}
	/**
	 * Sets the value of a property to an integer.
	 * 
	 * @param propName
	 *            the property name
	 * @param value
	 *            the value to set
	 * @throws SemanticException
	 *             If the property value cannot be converted from an integer, or
	 *             if the value of a choice is incorrect.
	 */
	public void setIntProperty( String propName, int value )
			throws SemanticException
	{
		setProperty( propName, new Integer( value ) );
	}
	/**
	 * Sets the value of a property to a string. Use this for properties such as
	 * expressions, labels, HTML, or XML. Also use it to set the value of a
	 * choice using the internal string name of the choice. Use it to set the
	 * value of a dimension when using specified units, such as "10pt".
	 * 
	 * @param propName
	 *            the property name