Added more specific HTTP status codes

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

@@ -5,6 +5,10 @@
  */
 package it.inaf.oats.vospace.exception;
 
+import org.springframework.http.HttpStatus;
+import org.springframework.web.bind.annotation.ResponseStatus;
+
+@ResponseStatus(value = HttpStatus.UNPROCESSABLE_ENTITY)
 public class NodeBusyException extends VoSpaceErrorSummarizableException {
 
     public NodeBusyException(String path) {

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

@@ -5,6 +5,10 @@
  */
 package it.inaf.oats.vospace.exception;
 
+import org.springframework.http.HttpStatus;
+import org.springframework.web.bind.annotation.ResponseStatus;
+
+@ResponseStatus(value = HttpStatus.BAD_REQUEST)
 public class ProtocolNotSupportedException extends VoSpaceErrorSummarizableException{
     
     public ProtocolNotSupportedException(String protocol) {