Modify code organization

cmdb-api/api/extensions.py

@@ -0,0 +1,23 @@
+# -*- coding:utf-8 -*-
+
+
+from celery import Celery
+from flask_bcrypt import Bcrypt
+from flask_caching import Cache
+from flask_cors import CORS
+from flask_login import LoginManager
+from flask_migrate import Migrate
+from flask_sqlalchemy import SQLAlchemy
+
+from api.lib.utils import ESHandler
+from api.lib.utils import RedisHandler
+
+bcrypt = Bcrypt()
+login_manager = LoginManager()
+db = SQLAlchemy()
+migrate = Migrate()
+cache = Cache()
+celery = Celery()
+cors = CORS(supports_credentials=True)
+rd = RedisHandler()
+es = ESHandler()