Bug 162281 Better parsing of BIRT_VIEWER_LOG_LEVEL parameter
java.util.logging.Level supplies a parse(String) method which parses log levels. Using this method is superior to the parsing used in ReportEngineServlet for the following reasons: - the level "ALL" is not recognized - one gets a proper exception if the level ins not recognized - a lot less code. I'll attach a patch for this.
viewer/org.eclipse.birt.report.viewer/birt/WEB-INF/classes/org/eclipse/birt/report/service/ReportEngineService.java
while ( keys.hasNext( ) )
			{
				String paramName = DataUtil.getString( keys.next( ) );
				String displayText = DataUtil.getString( displayTexts
						.get( paramName ) );
				runTask.setParameterDisplayText( paramName, displayText );
			}
		}
		HashMap context = new HashMap( );
		
		
		Boolean isDesigner = Boolean.valueOf( ParameterAccessor
				.isDesigner( request ) );
		context
				.put(
						"org.eclipse.birt.data.engine.dataset.cache.option", isDesigner ); 
		context.put( EngineConstants.APPCONTEXT_BIRT_VIEWER_HTTPSERVET_REQUEST,
				request );
		context.put( EngineConstants.APPCONTEXT_CLASSLOADER_KEY,
				ReportEngineService.class.getClassLoader( ) );
		
		ParameterAccessor.pushAppContext( context, request );
		runTask.setAppContext( context );
		
		try
		{
			runTask.run( documentName );
		}
		catch ( BirtException e )
		{