SSDM-13839: Working on directory creation.

...a/src/main/java/ch/ethz/sis/afsapi/api/OperationsAPI.java

...src/main/java/ch/ethz/sis/afsclient/client/AfsClient.java

...test/java/ch/ethz/sis/afsclient/client/AfsClientTest.java

...stem/src/main/java/ch/ethz/sis/afs/api/OperationsAPI.java

...n/java/ch/ethz/sis/afs/dto/operation/CreateOperation.java

...ain/java/ch/ethz/sis/afs/dto/operation/OperationName.java

...n/java/ch/ethz/sis/afs/manager/TransactionConnection.java

...java/ch/ethz/sis/afsserver/worker/proxy/AuditorProxy.java

.../ethz/sis/afsserver/worker/proxy/AuthenticationProxy.java

...h/ethz/sis/afsserver/worker/proxy/AuthorizationProxy.java

...ava/ch/ethz/sis/afsserver/worker/proxy/ExecutorProxy.java

...ain/java/ch/ethz/sis/afsserver/worker/proxy/LogProxy.java

...a/ch/ethz/sis/afsserver/worker/proxy/ValidationProxy.java

.../ch/ethz/sis/afsserver/core/AbstractPublicAPIWrapper.java