assert the circuitBreakerForceClosed property

The motivation here is the "propertyValue_circuitBreakerForceOpen" is currently being checked
to make sure there is a value.  It would make sense that the "propertyValue_circuitBreakerForceClosed"
value also be checked

Author: lholmquist

hystrix-dashboard/src/main/webapp/components/hystrixCommand/hystrixCommand.js

@@ -174,6 +174,7 @@
             assertNotNull(data,"propertyValue_circuitBreakerSleepWindowInMilliseconds");
             assertNotNull(data,"propertyValue_circuitBreakerErrorThresholdPercentage");
             assertNotNull(data,"propertyValue_circuitBreakerForceOpen");
+            assertNotNull(data,"propertyValue_circuitBreakerForceClosed");
             assertNotNull(data,"propertyValue_executionIsolationStrategy");
             assertNotNull(data,"propertyValue_executionIsolationThreadTimeoutInMilliseconds");
             assertNotNull(data,"propertyValue_executionIsolationThreadInterruptOnTimeout");