Use method call instead of value reference so that HystrixThreadPoolP…

…roperties may be overridden

hystrix-core/src/main/java/com/netflix/hystrix/HystrixThreadPoolProperties.java

@@ -138,7 +138,7 @@ public HystrixProperty<Integer> maximumSize() {
     public Integer actualMaximumSize() {
         final int coreSize = coreSize().get();
         final int maximumSize = maximumSize().get();
-        if (allowMaximumSizeToDivergeFromCoreSize.get()) {
+        if (getAllowMaximumSizeToDivergeFromCoreSize().get()) {
             if (coreSize > maximumSize) {
                 return coreSize;
             } else {