DOC: Added copyright notices.

...g/caosdb/server/accessControl/CaosDBAuthorizingRealm.java

src/main/java/org/caosdb/server/accessControl/Role.java

...ain/java/org/caosdb/server/accessControl/UserSources.java

...atabase/backend/implementation/MySQL/MySQLDeleteRole.java

...database/backend/implementation/MySQL/MySQLListRoles.java

...database/backend/implementation/MySQL/MySQLListUsers.java

...abase/backend/implementation/MySQL/MySQLLogUserVisit.java

.../backend/implementation/MySQL/MySQLRetrieveEntityACL.java

...abase/backend/implementation/MySQL/MySQLRetrieveRole.java

...se/backend/implementation/MySQL/MySQLUpdateUserRoles.java