Don't cache key resolutions when cleanup interval is zero (#94)

Author: segabriel

tokens/src/main/java/io/scalecube/security/tokens/jwt/JwtTokenResolverImpl.java

@@ -114,6 +114,10 @@ public Mono<Map<String, Object>> resolve(String token) {
   }
 
   private Mono<Key> findKey(String kid, AtomicReference<Mono<Key>> computedValueHolder) {
+    if (cleanupInterval.isZero()) {
+      return Mono.defer(() -> keyProvider.findKey(kid)).cache();
+    }
+
     return keyResolutions.computeIfAbsent(
         kid,
         (kid1) -> {