Added the possibility to name the default switch condition (#627)

Author: cdavernas

schema/workflow.json

@@ -1204,6 +1204,10 @@
       "type": "object",
       "description": "DefaultCondition definition. Can be either a transition or end definition",
       "properties": {
+        "name":{
+          "type": "string",
+          "description": "The optional name of the default condition, used solely for display purposes"
+        },
         "transition": {
           "$ref": "#/definitions/transition"
         },