Added cause to thrown error

Signed-off-by: Alberto Codutti <alberto.codutti@eurotech.com>

service/device/management/job/internal/src/main/java/org/eclipse/kapua/service/device/management/job/scheduler/internal/JobDeviceManagementTriggerManagerServiceImpl.java

@@ -152,7 +152,7 @@ public void processOnConnect(KapuaId scopeId, KapuaId deviceId) throws ProcessOn
             }
 
         } catch (Exception e) {
-            throw new ProcessOnConnectException(scopeId, deviceId);
+            throw new ProcessOnConnectException(e, scopeId, deviceId);
         }
     }
 }