Source interarival time can be configured like distribution type of a machine

dream/simulation/GUI/Default.py

@@ -213,26 +213,31 @@ schema = {
 }
 
 # complex schemas (Dream.PropertyList)
-schema["interarrivalTime"] = {
-  "id": "interarrivalTime",
+schema["processingTime"] = {
+  "id": "processingTime",
   "property_list": [
     schema["distributionType"],
-    schema["mean"]],
+    schema["mean"],
+    schema["stdev"],
+    schema["min"],
+    schema["max"]
+  ],
   "_class": "Dream.PropertyList"
 }
 
-schema["processingTime"] = {
-  "id": "processingTime",
+schema["interarrivalTime"] = {
+  "id": "interarrivalTime",
   "property_list": [
     schema["distributionType"],
     schema["mean"],
     schema["stdev"],
     schema["min"],
-    schema["max"]
+    schema["max"],
   ],
   "_class": "Dream.PropertyList"
 }
 
+
 schema["failures"] = {
   "id": "failures",
   "property_list": [