various fixes (#70)

- dont show ccr status if license insufficient
- add automated tests
- fix config loading
- fix search output
- fix `license show` panics
- fix `ilm show` completion
- print ask passwd prompt to stderr

pkg/es/ccr.go

@@ -102,7 +102,7 @@ func CcrRemoteInfo(conf *cfg.Config, index string) error {
 	}
 
 	if remote == "" {
-		return fmt.Errorf("cluster doesn't follow any other: %s", err)
+		return errors.New("cluster doesn't follow any other")
 	}
 
 	mode := "follower"