Addressed review comments.

...java/src/org/sleuthkit/datamodel/CaseDatabaseFactory.java

bindings/java/src/org/sleuthkit/datamodel/OsAccount.java

.../java/src/org/sleuthkit/datamodel/OsAccountAttribute.java

...gs/java/src/org/sleuthkit/datamodel/OsAccountManager.java

...va/src/org/sleuthkit/datamodel/OsAccountRealmManager.java

bindings/java/src/org/sleuthkit/datamodel/SleuthkitCase.java

...ings/java/test/org/sleuthkit/datamodel/OsAccountTest.java