Force isCircuitBreakerOpen to String (if it's a Boolean for example)

see Netflix/Hystrix#927

spring-cloud-netflix-hystrix-dashboard/src/main/resources/static/hystrix/components/hystrixCommand/templates/hystrixCircuit.html

@@ -42,7 +42,7 @@
 			<% } else {
 				/* We have some circuits that are open */  
 			%>
-				Circuit <font color="orange"><%= isCircuitBreakerOpen.replace("true", "Open").replace("false", "Closed") %>)</font>
+				Circuit <font color="orange"><%= isCircuitBreakerOpen.toString().replace("true", "Open").replace("false", "Closed") %>)</font>
 			<% }  %>
 		<% } %>
 		</div>