Summary

REST API (rest/api/2/mypreferences) doesn't work correctly on JIRA 7.1.6.
It worked on JIRA 7.1.4 as expected.

Steps to Reproduce

1. Use a REST API (rest/api/2/mypreferences) as follows
   • GET request to <BASE_URL>/rest/api/2/mypreferences?key=jira.user.locale
2. Check the response

Expected Results

The response should contain information about a current locale setting of the user as JIRA 7.1.4 was (e.g. "en_US")

Actual Results

404 error happened with the message "key not found: 'jira.user.locale'".

Notes

• If any update on the API spec side and it is not a bug, could you please also update the API doc?
• When being fixed this bug, please make sure if PUT and DELETE method also works as expected?