message: [ADLA] Clarifying credential creation helptext
  Clarifying which database should be specified when creating a catalog credential for Data Lake Analytics
diff: "in": "path",
  "required": true,
  "type": "string",
  - "description": "The name of the database in which to create the credential."
  + "description": "The name of the database in which to create the credential. Note: This is NOT an external database name, but the name of an existing U-SQL database that should contain the new credential object."
  },
  {
  "name": "credentialName",
  