Throw error if diagram-server returns HttpStatus.FORBIDDEN (#840)

* Throw error if diagram-server returns HttpStatus.FORBIDDEN

Signed-off-by: BOUTIER Charly <[email protected]>

Author: EstherDarkish

src/main/java/org/gridsuite/study/server/service/SingleLineDiagramService.java

@@ -193,6 +193,8 @@ public String getNetworkAreaDiagram(UUID networkUuid, String variantId, String n
                 throw new StudyException(SVG_NOT_FOUND, VOLTAGE_LEVEL + NOT_FOUND);
             } else if (HttpStatus.BAD_REQUEST.equals(e.getStatusCode())) {
                 throw new StudyException(BAD_PARAMETER, e.getMessage());
+            } else if (HttpStatus.FORBIDDEN.equals(e.getStatusCode())) {
+                throw handleHttpError(e, NOT_ALLOWED);
             } else {
                 throw e;
             }