fix jsonschema test

[shadowpigy]

The jsonschema tests are outdated.

The main difference is that the properties field is now omitempty.
Another problem is that the last test case with regard to array is incorrect. The following is not a valid json schema. The properties keyword should be nested within an object type, not at the root level of an array type.

{
   "type":"array",
   "items":{
      "type":"string",
      "properties":{
         
      }
   },
   "properties":{
      "name":{
         "type":"string",
         "properties":{}
      }
   }
}