Bug 200812 Issue when remove one separator setting in viewer.property[0002]
Description: Issue when remove one separator setting in viewer.property Build number:2.2.1.v200708220927 Steps to reproduce: 1. Deploy birt. 2. Open viewer.properties under WEB-INF folder. 3. Delete "viewer.sep.0=," line 4. Start server. 5. Preview report. 6. Export Data, select columns and select "Comma(,)", click OK. Expected result: Comma(,) isn't in the separator list. Actual result: Nothing happened after step6 and no error logs. Error log:n/a
viewer/org.eclipse.birt.report.viewer/birt/WEB-INF/classes/org/eclipse/birt/report/utility/ParameterAccessor.java
String parameterName )
	{
		return getParameterValues( request, parameterName, true );
	}
	/**
	 * Get report file name. If passed file path is null, get report file from
	 * request.
	 * 
	 * @param request
	 * @param filePath
	 * @return report file
	 */
	public static String getReport( HttpServletRequest request, String filePath )
	{
		if ( filePath == null )
			filePath = DataUtil
					.trimString( getParameter( request, PARAM_REPORT ) );
		return getRealPathOnWorkingFolder( filePath, request );
	}
	/**
	 * Get report document name. If passed file path is null, get document file
	 * from request. If isCreated is true, try to create the document file when
	 * file path is null.
	 * 
	 * @param request
	 * @param filePath
	 * @param isCreated
	 * @return
	 */
	public static String getReportDocument( HttpServletRequest request,