Fix for Ruby SDK generation (#8908)

* Fix for Ruby SDK generation

* Update definitions.json

Author: mmyyrroonn

specification/apimanagement/resource-manager/Microsoft.ApiManagement/preview/2018-06-01-preview/definitions.json

@@ -1,8 +1,8 @@
 {
   "swagger": "2.0",
   "info": {
-    "version": "1.0",
-    "title": "Definitions file"
+    "title": "Definitions file",
+    "version": "2018-06-01-preview"
   },
   "paths": {},
   "definitions": {