Fix constructor JSDoc

lib/models/access-context.js

@@ -7,6 +7,7 @@ var debug = require('debug')('loopback:security:access-context');
  * resources
  *
  * @class
+ * @options {Object} context The context object
  * @property {Principal[]} principals An array of principals
  * @property {Function} model The model class
  * @property {String} modelName The model name
@@ -16,7 +17,6 @@ var debug = require('debug')('loopback:security:access-context');
  * @property {String} accessType The access type
  * @property {AccessToken} accessToken The access token
  *
- * @param {Object} context The context object
  * @returns {AccessContext}
  * @constructor
  */