Bug 151535 Parameters are invisable in Joint Dataset
Trying to use "Joint Dataset" combined with parameters within underlaying Data-Sets (neccessary to achive a filtering where clause for a DateTime Field) Parameter editing ( e.g. in Chart designer) do not show the entire parameter. As specified it should show and let to edit a combination of both underlaying datasets' parameters.
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/adapter/ModelDteApiAdapter.java
dteSource.addPrivateProperty( modelProp.getName( ), modelProp
						.getValue( ) );
			}
		}
        addPropertyConfigurationId( dteSource );
		return dteSource;
	}
	/**
	 * Adds the externalized property configuration id for use by 
	 * a BIRT consumer application's propertyProvider extension.
	 */
	private void addPropertyConfigurationId( OdaDataSourceDesign dteSource )
		throws BirtException
	{
		String configIdValue = dteSource.getExtensionID() + 
                                  Constants.ODA_PROP_CONFIG_KEY_SEPARATOR +
        						  dteSource.getName();
		dteSource.addPublicProperty( Constants.ODA_PROP_CONFIGURATION_ID, configIdValue );
	}
	
	/**
	 * 
	 * @param source
	 * @return
	 */
	IScriptDataSourceDesign newScriptDataSource( ScriptDataSourceHandle source )
	{
		ScriptDataSourceDesign dteSource = new ScriptDataSourceDesign( source
				.getQualifiedName( ) );
		IScriptDataSourceEventHandler eventHandler = new ScriptDataSourceScriptExecutor(