Added json format to lab

Author: rofrano

lab/README.md

@@ -8,6 +8,7 @@ Assume you have been asked to create a web service that can keep track of multip
 
 - The API must be RESTful.
 - The endpoint must be called `/counters`.
+- The data returned should be this `{"name":"some_name", "counter":0}`
 - When creating a counter, you must specify the name in the path.
 - Duplicate names must return a conflict error code.
 - The service must be able to update a counter by name.

lab/test_counter.py

@@ -4,8 +4,8 @@
 Requirements for the counter service
 - The API must be RESTful.
 - The endpoint must be called `/counters`.
+- The data returned should be this {"name":"some_name", "counter":0}
 - When creating a counter, you must specify the name in the path.
-- The data returned should be this {"name":"some_name", "counter:0}
 - Duplicate names must return a 409 conflict error code.
 - The service must be able to update a counter by name.
 - The service must be able to get a counter's current value.