Refactoring for error detail endpoint development

...af/oats/vospace/exception/ContainerNotFoundException.java

...t/inaf/oats/vospace/exception/DuplicateNodeException.java

...a/it/inaf/oats/vospace/exception/ErrorSummaryFactory.java

...t/inaf/oats/vospace/exception/InternalFaultException.java

...inaf/oats/vospace/exception/InvalidArgumentException.java

...a/it/inaf/oats/vospace/exception/InvalidURIException.java

...va/it/inaf/oats/vospace/exception/LinkFoundException.java

...ava/it/inaf/oats/vospace/exception/NodeBusyException.java

...it/inaf/oats/vospace/exception/NodeNotFoundException.java

...naf/oats/vospace/exception/PermissionDeniedException.java

...oats/vospace/exception/ProtocolNotSupportedException.java

...java/it/inaf/oats/vospace/exception/VOSpaceFaultEnum.java

.../vospace/exception/VoSpaceErrorSummarizableException.java