[#717] Reformat java files
[#717] Calculate the HMAC signature only if client time and server time are within specified time window.
[#717] Add UserRestService endpoints to create and delete apikeys

* POST /users/{id}/apikeys -- Create new apikeys for user
* DELETE /users/{id}/apikeys -- Delete apikeys for user
[#717] Added ability to (re)generate and revoke apikeys from the Dashboard