LMS-1365 setSessionUser() with tests implemented. Missing: white list of hosts

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

...msx/cisd/openbis/generic/server/AbstractServerLogger.java

...ch/systemsx/cisd/openbis/generic/server/CommonServer.java

...temsx/cisd/openbis/generic/server/CommonServerLogger.java

...a/ch/systemsx/cisd/openbis/generic/server/ETLService.java

...ystemsx/cisd/openbis/generic/server/ETLServiceLogger.java

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

...msx/cisd/openbis/generic/server/TrackingServerLogger.java

...java/ch/systemsx/cisd/openbis/generic/shared/IServer.java

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

.../systemsx/cisd/openbis/plugin/demo/server/DemoServer.java

...msx/cisd/openbis/plugin/demo/server/DemoServerLogger.java

...msx/cisd/openbis/plugin/generic/server/GenericServer.java

...sd/openbis/plugin/generic/server/GenericServerLogger.java

...ystemsx/cisd/openbis/plugin/query/server/QueryServer.java

...x/cisd/openbis/plugin/query/server/QueryServerLogger.java

.../systemsx/cisd/openbis/systemtest/SetSessionUserTest.java