Added QuotaExceededException

src/main/java/it/inaf/oats/vospace/exception/QuotaExceededException.java

+package it.inaf.oats.vospace.exception;
+
+import org.springframework.http.HttpStatus;
+import org.springframework.web.bind.annotation.ResponseStatus;
+
+@ResponseStatus(HttpStatus.INSUFFICIENT_STORAGE)
+public class QuotaExceededException extends VoSpaceErrorSummarizableException {
+
+    public QuotaExceededException(String errorDetail) {
+        super(errorDetail, VOSpaceFaultEnum.QUOTA_EXCEEDED);
+    }
+}

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

@@ -26,7 +26,8 @@ public enum VOSpaceFaultEnum {
     // additional for pushfrom
     TRANSFER_FAILED("Transfer Failed", ErrorType.FATAL, "TransferFailed"),
     // additional for movenode/copynode
-    DUPLICATE_NODE("Duplicate Node", ErrorType.FATAL, "DuplicateNode");
+    DUPLICATE_NODE("Duplicate Node", ErrorType.FATAL, "DuplicateNode"),
+    QUOTA_EXCEEDED("Quota Exceeded", ErrorType.FATAL, "QuotaExceeded");
 
     private final String faultRepresentation;
     private final ErrorType type;

src/main/java/it/inaf/oats/vospace/exception/VoSpaceErrorSummarizableException.java

@@ -12,7 +12,7 @@ import org.springframework.web.bind.annotation.ResponseStatus;
 public abstract class VoSpaceErrorSummarizableException extends VoSpaceException {
     
     VOSpaceFaultEnum fault;
-    private String detailMessage;
+    private final String detailMessage;
     
     public VoSpaceErrorSummarizableException(String detailMessage, VOSpaceFaultEnum fault)
     {