Bug 131835 Clean up FO related code
Now that FO is not part of BIRT, clean up all references to FO, including the FORenderOption, TailoredForFOP, etc.
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/api/impl/EngineTask.java
/**
	 * use the user setting parameters values to setup the execution context.
	 * the user setting values and default values are merged here.
	 */
	protected void usingParameterValues( )
	{
		if ( !parameterChanged )
		{
			return;
		}
		parameterChanged = false;
		
		executionContext.getParams( ).clear( );
		runValues.clear( );
		
		executionContext.getParams( ).putAll( inputValues );
		runValues.putAll( inputValues );
		
		new ParameterVisitor( ) {
			boolean visitScalarParameter( ScalarParameterHandle param,
					Object userData )
			{
				String name = param.getName( );
				if ( !inputValues.containsKey( name ) )
				{
					Object value = convertToType( param.getDefaultValue( ),
							param.getDataType( ) );
					executionContext.getParams( ).put( name, value );
					runValues.put( name, value );
				}