LDEV-3335, LDEV-3334: Use SSO mechanism introduced in WildFly 9. Do not create web.xml files with XDoclet as it can not produce them based on 3.1 schema. Use static ones instead. Make SessionManager just a proxy to webserver's HTTP session. Remov custom shared sessions and JSESSIONIDSSO cookie as they are obsolete. Remove own session monitoring as the container should take care of invalidation. Move injecting UserDTO into session to SsoHandler intead of UniversalLoginModule as an authentication request may not reach the latter due to WildFly credentials caching.
LDEV-1261 improve import user speed by running in separate thread (bypass hibernate filter), and update browser with progress every 5 seconds so it doesn't timeout.
LDEV-1261 remove import spreadsheet actions from customised hibernate filter - need to enumerate each url in lams_admin that requires the filter from now on