Merge pull request #1585 from mattrjacobs/fix-codahale-metrics-thread…

…pool

Fix incorrect return value in CodaHale metrics publisher of threadpool config

hystrix-contrib/hystrix-codahale-metrics-publisher/src/main/java/com/netflix/hystrix/contrib/codahalemetricspublisher/HystrixCodaHaleMetricsPublisherThreadPool.java

@@ -156,7 +156,7 @@ public Number getValue() {
         metricRegistry.register(createMetricName("propertyValue_actualMaximumSize"), new Gauge<Number>() {
             @Override
             public Number getValue() {
-                return properties.maximumSize().get();
+                return properties.actualMaximumSize();
             }
         });