message: fix HookInfo and HookInfoPatch
diff: {
  "swagger": "2.0",
  "info": {
  - "title": "Azure Cognitive Service Metrics Advisor REST API (OpenAPI v2)",
  - "description": "Azure Cognitive Service Metrics Advisor REST API (OpenAPI v2)",
  + "title": "Microsoft Azure Metrics Advisor REST API (OpenAPI v2)",
  + "description": "Microsoft Azure Metrics Advisor REST API (OpenAPI v2)",
  "version": "1.0"
  },
  "paths": {
  "type": "array",
  "items": {
  "type": "string"
  - },
  - "readOnly": true
  + }
  }
  },
  "discriminator": "hookType"
  "type": "array",
  "items": {
  "type": "string"
  - },
  - "readOnly": true
  + }
  }
  },
  "discriminator": "hookType"
  