Add Rate Limit provider

[lbalmaceda]

Default Rate Limit applied is 10 tokens per minute. The limit can be disabled by calling builder.rateLimited(false).

new JwkProviderBuilder()
   .rateLimited(false);
   .build();

If you need to customize the Rate Limit values, use

long size = 10;
long rate = 30;
TimeUnit unit = TimeUnit.SECONDS;

new JwkProviderBuilder()
   .rateLimited(size, rate, unit);
   .build();