Fix BrokerRunningTest back to http for management

https://build.spring.io/browse/AMQP-MASTER-1059/

spring-rabbit-junit/src/test/java/org/springframework/amqp/rabbit/junit/BrokerRunningTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2017 the original author or authors.
+ * Copyright 2017-2019 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -44,7 +44,7 @@ public void testVars() {
 		brokerRunning.setPort(1234);
 		brokerRunning.setUser("fiz");
 
-		assertEquals("https://baz:15672/api/", brokerRunning.getAdminUri());
+		assertEquals("http://baz:15672/api/", brokerRunning.getAdminUri());
 		ConnectionFactory connectionFactory = brokerRunning.getConnectionFactory();
 		assertEquals("baz", connectionFactory.getHost());
 		assertEquals(1234, connectionFactory.getPort());