Change JW media endpoint cache busting to sleep

[donut]

https://github.com/RightThisMinute/OVPSync/blob/1d6a9e3db89ba5d784849e9afb9a24c3ac26ab6a/lib/jw_source/prepare.ml#L32

RTM + JW Cache busting call

2020/07/22

Cache is set at 3 minutes. So we can remove the cache buster and setup a sleep or something so that it’s not checked until the cache would for sure have been refreshed (maybe 4 minutes)?

Alternatively, just use the management API.

Also, make sure to update JW once these changes are made.