made remote manager available to ReefEventStateManager and update tests

this is first part of 859
May be put those two bindings in HttpHandlerConfiguration if they are always required. 
      .bindNamedParameter(RemoteConfiguration.ManagerName.class, "REEF_TEST_REMOTE_MANAGER")
      .bindNamedParameter(RemoteConfiguration.MessageCodec.class, REEFMessageCodec.class)

It would end up like 

  public static final ConfigurationModule CONF = new HttpHandlerConfiguration().merge(HttpRuntimeConfiguration.CONF)
      .bindSetEntry(HttpEventHandlers.class, HTTP_HANDLERS)
      .bindImplementation(TrackingURLProvider.class, HttpTrackingURLProvider.class)
      .bindNamedParameter(RemoteConfiguration.ManagerName.class, "REEF_TEST_REMOTE_MANAGER")
      .bindNamedParameter(RemoteConfiguration.MessageCodec.class, REEFMessageCodec.class)
      .build()