chore: reorg imports, format code, make MaxRetires default to 0 (#1165)

* chore: reverse the order of stopping services

* chore: reverse the order of stopping services

* chore: reorg imports, format code

* chore: format code, and refactor

* feat: change MaxRetries default to 0, disable retry

core/retry/backoff/backoff_test.go

@@ -1,9 +1,10 @@
 package backoff
 
 import (
-	"github.com/stretchr/testify/assert"
 	"testing"
 	"time"
+
+	"github.com/stretchr/testify/assert"
 )
 
 func TestWaitBetween(t *testing.T) {