only run flagger if the control channel exists
only run flagger if the control channel exists

randsleadershipslack/destalinator,randsleadershipslack/destalinator,sprucehealth/destalinator,underarmour/destalinator,royrapoport/destalinator,TheConnMan/destalinator,sprucehealth/destalinator,royrapoport/destalinator,TheConnMan/destalinator