`JsonFilePolicyDefinition.DEFAULT_POLICY_FILE_NAME` should have a leading /

[farrukhnajmi]

Thanks for an awesome blog and sample project!

Here is a minor issue I found...

The JsonFilePolicyDefinition.DEFAULT_POLICY_FILE_NAME should have a leading / to find it as a root level classpath resource in src/main/resources:

Current: private static String DEFAULT_POLICY_FILE_NAME = "default-policy.json";
Fixed: private static String DEFAULT_POLICY_FILE_NAME = "/default-policy.json";