ConsentInterceptor is called on metadata calls

[tadgh]

Currently, consent interceptor is invoked during calls to /metadata, and the $meta operation. This is an error, and the consent interceptor should ignore checks on those endpoints.

Solution:

1. if a request is a meta operation, or navigating to /metadata, the hook should just return
2. We should still call completeOperationFailure() and completeOperationSuccess()