fix log level helper (#1342)

Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>

logger/helper.go

@@ -1,6 +1,8 @@
 package logger
 
-import "os"
+import (
+	"os"
+)
 
 type Helper struct {
 	Logger

logger/level.go

@@ -116,11 +116,11 @@ func Fatalf(template string, args ...interface{}) {
 	os.Exit(1)
 }
 
-// Returns true if the given level is at or above the current logger level
+// Returns true if the given level is at or lower the current logger level
 func V(lvl Level, log Logger) bool {
 	l := DefaultLogger
 	if log != nil {
 		l = log
 	}
-	return l.Options().Level >= lvl
+	return l.Options().Level <= lvl
 }