Fix: Issue #1957 (#1994)

Fix Inssue #1957

Author: GustavoOliani

circuit-breaker/src/main/java/com/iluwatar/circuitbreaker/DefaultCircuitBreaker.java

@@ -38,7 +38,7 @@ public class DefaultCircuitBreaker implements CircuitBreaker {
   int failureCount;
   private final int failureThreshold;
   private State state;
-  private final long futureTime = 1000 * 1000 * 1000 * 1000;
+  private final long futureTime = 1000L * 1000 * 1000 * 1000;
 
   /**
    * Constructor to create an instance of Circuit Breaker.