SSDM-13365: Updated copyright comments in lib-transactional-file-system

...hz/sis/afs/manager/AbstractTransactionConnectionTest.java

.../ch/ethz/sis/afs/manager/HierarchicalLockManagerTest.java

...rc/test/java/ch/ethz/sis/afs/manager/LockManagerTest.java

...test/java/ch/ethz/sis/afs/manager/PathLockFinderTest.java

.../ch/ethz/sis/afs/manager/TransactionStateManagerTest.java

...s/manager/operation/AbstractTransactionOperationTest.java

...s/afs/manager/operation/CopyTransactionOperationTest.java

...afs/manager/operation/DeleteTransactionOperationTest.java

...s/afs/manager/operation/ListTransactionOperationTest.java

...s/afs/manager/operation/MoveTransactionOperationTest.java

...s/afs/manager/operation/ReadTransactionOperationTest.java

.../afs/manager/operation/WriteTransactionOperationTest.java