feat: use mongodb official driver instead of mgo (#1782)

* wip: backup

* wip: backup

* wip: backup

* backup

* backup

* backup

* add more tests

* fix wrong dependency

* fix lint errors

* remove test due to data race

* add tests

* fix test error

* add mon.Model

* add mon.Model unmarshal

* add monc

* add more tests for monc

* add more tests for monc

* add docs for mon and monc packages

* fix doc errors

* chhore: add comment

* chore: fix test bug

* chore: refine tests

* chore: remove primitive.NewObjectID in test code

* chore: rename test files for typo

core/syncx/resourcemanager.go

@@ -68,3 +68,10 @@ func (manager *ResourceManager) GetResource(key string, create func() (io.Closer
 
 	return val.(io.Closer), nil
 }
+
+// Inject injects the resource associated with given key.
+func (manager *ResourceManager) Inject(key string, resource io.Closer) {
+	manager.lock.Lock()
+	manager.resources[key] = resource
+	manager.lock.Unlock()
+}