Update OpenAPISpecification.yaml

changed return type of getNumberOfInstances to number

Author: janniclas

OpenAPISpecification.yaml

@@ -129,10 +129,8 @@ paths:
         200:
           description: "successful operation"
           schema:
-            type: "object"
-            additionalProperties:
-              type: "integer"
-              format: "int32"
+            type: "integer"
+            format: "int32"
         400:
           description: "Invalid ID supplied"
         404:
@@ -190,4 +188,4 @@ definitions:
     properties:
       ID:
         type: "integer"
-        format: "int64"
+        format: "int64"