Bug 134444 Locale setting lost when change current page with internal bookmark
Description: Locale setting lost when change current page with internal bookmark Steps to reproduce: 1. Insert two labels 2. Add bookmark in the first label 3. In the second label,set internal bookmark link to the first label, set page-break-before to always. 4. In preference, set Locale to a different locale. 5. Preview in Web Viewer, go to the second page and click the link. Expected result: Locale setting in webaddress keeps unchanged. Actual result: After click the link, Locale setting lost in webaddress.
viewer/org.eclipse.birt.report.viewer/birt/WEB-INF/classes/org/eclipse/birt/report/service/ReportEngineService.java
* 
	 * @return
	 */
	public static ReportEngineService getInstance( )
	{
		return instance;
	}
	/**
	 * Get engine instance. This method is not thread safe should be protected
	 * by the caller.
	 * 
	 * @return engine instance
	 * @throws BirtException
	 */
	public static void initEngineInstance( ServletConfig servletConfig )
			throws BirtException
	{
		if ( ReportEngineService.instance != null )
			return;
		ReportEngineService.instance = new ReportEngineService( servletConfig );
	}
	/**
	 * Get all the files under the specified folder (including all the files
	 * under sub-folders)
	 * 
	 * @param dir -
	 *            the folder to look into
	 * @param fileList -
	 *            the fileList to be returned
	 */