code: public Promise waitForServices(long timeoutMillis, String... services) {
  		return waitForServices(timeoutMillis, Arrays.asList(services));
  	}
docs: Waits for one (or an array of) service(s). Sample code:<br>
  <br>
  broker.waitForServices(5000, "logger").then(in -&gt; {<br>
  broker.getLogger().info("Logger started successfully");<br>
  }.catchError(error -&gt; {<br>
  broker.getLogger().info("Logger did not start");<br>
  }
  
  @param timeoutMillis
  timeout in milliseconds
  @param services
  array of service names
  
  @return listenable Promise