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
* (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.report.engine.api2.IRunAndRenderTask#validateParameters()
	 */
	public boolean validateParameters( )
	{
		
		usingParameterValues( );
		
		return new ParameterVisitor( ) {
			boolean visitScalarParameter( ScalarParameterHandle param,
					Object value )
			{
				return validateScalarParameter( param );
			}
			boolean visitParameterGroup( ParameterGroupHandle group,
					Object value )
			{
				return visitParametersInGroup( group, value );
			}
		}.visit( (ReportDesignHandle) runnable.getDesignHandle( ), null );
	}
	/**
	 * validate whether the parameter value is a valid value for the parameter
	 * 
	 * @param p
	 *            the parameter to be verified
	 * @param paramValue
	 *            the value for the parameter
	 * @return true if the given parameter value is valid; false otherwise