415401 WebAppProvider: override XmlConfiguration.initializeDefaults
415401 Add initalizeDefaults call to SpringConfigurationProcessor

remove deprecated XmlBeansFactory usage
416266  HttpServletResponse.encodeURL() encodes on first request when only SessionTrackingMode.COOKIE is used
Merge remote-tracking branch 'origin/jetty-8'

Conflicts:
	jetty-webapp/src/main/java/org/eclipse/jetty/webapp/StandardDescriptorProcessor.java
Merge remote-tracking branch 'origin/master' into jetty-9.1

Conflicts:
	jetty-deploy/src/main/java/org/eclipse/jetty/deploy/providers/WebAppProvider.java