fixed register schema for multiple versions

lib/schema-registry.js

@@ -93,8 +93,10 @@ function typeFromSchemaResponse(schema, parseOptions) {
   var schemaType = avro.parse(schema);
 
   //check if the schema has been previouisly parsed and added to the registry
-  if(typeof parseOptions.registry === 'object' && typeof parseOptions.registry[schemaType.name] !== 'undefined'){
-    return parseOptions.registry[schemaType.name];
+  if(typeof parseOptions.registry === 'object' && typeof parseOptions.registry[schemaType.name] !== 'undefined'){    
+    //avsc registry works on the name of the schema and not on name+version.
+    //So, it's safe to delete the cached one in the registry parse the schema again
+    delete parseOptions.registry[schemaType.name];
   }
 
   return avro.parse(schema, parseOptions);