More tests and some cleanup

src/main/java/caosdb/server/CaosAuthenticator.java

src/main/java/caosdb/server/CaosDBServer.java

...java/caosdb/server/accessControl/AuthenticationUtils.java

...osdb/server/accessControl/OneTimeAuthenticationToken.java

src/main/java/caosdb/server/accessControl/UserSources.java

src/main/java/caosdb/server/permissions/EntityACL.java

src/main/java/caosdb/server/transaction/Transaction.java

src/test/java/caosdb/server/permissions/EntityACLTest.java

...st/java/caosdb/server/resource/TestScriptingResource.java