fix(swagger): restore apikey security definition with Bearer usage description

docs/swagger.yaml

@@ -798,7 +798,7 @@ info:
     email: support@swagger.io
     name: API Support
     url: http://www.swagger.io/support
-  description: Master key for tenant API access
+  description: Management API for EZ-API Gateway system.
   license:
     name: Apache 2.0
     url: http://www.apache.org/licenses/LICENSE-2.0.html
@@ -3025,4 +3025,17 @@ paths:
       summary: Update child key
       tags:
       - master
+securityDefinitions:
+  AdminAuth:
+    description: 'Type "Bearer" followed by a space and the admin token. Example:
+      Bearer admin123'
+    in: header
+    name: Authorization
+    type: apiKey
+  MasterAuth:
+    description: 'Type "Bearer" followed by a space and the master key. Example: Bearer
+      sk-xxx'
+    in: header
+    name: Authorization
+    type: apiKey
 swagger: "2.0"