LMS-445 GenericServer with authentication and session management implemented

...nbis/generic/client/web/client/IGenericClientService.java

...generic/client/web/client/IGenericClientServiceAsync.java

...openbis/generic/client/web/client/dto/SessionContext.java

...enbis/generic/client/web/server/GenericClientService.java

...eneric/client/web/server/GenericClientServiceServlet.java

...stemsx/cisd/openbis/generic/genericApplicationContext.xml

...e/java/ch/systemsx/cisd/openbis/generic/server/.gitignore

...h/systemsx/cisd/openbis/generic/server/GenericServer.java

...isd/openbis/generic/server/LogMessagePrefixGenerator.java

.../systemsx/cisd/openbis/generic/server/SessionFactory.java

.../systemsx/cisd/openbis/generic/shared/IGenericServer.java

.../ch/systemsx/cisd/openbis/generic/shared/dto/Session.java

openbis/source/java/service.properties