Api modify

[ydye]

• API to update user email
• Modify userinfo return value. Add virtualCluster and admin
• Replace grouplist Update api with virtualCluster Update api
• Remove the grouplist field when creating an user. Instead, add virtualCluster and admin fields when creating an user.
• API to update user admin permission.
• Modify API to update extension field. Only overwrite the corresponding key's value instead of the whole extension field.
• When granting an user with the admin permission, add all group into its grouplist. And when removing the admin permission from an user, keep other group in the grouplist.
• Default group

[coveralls]

Coverage decreased (-0.5%) to 50.7% when pulling 76a9030 on yuye/passwordChangeFix into ebc46ef on authndev.

[mslichao]