Refactored DeliveryProfileLiveAppleHttp::checkIsLive()
PLAT-1571 #time 2d
Limiting the number of URLs in is-live tests; Renamed a method.
PLAT-1571
Not limiting the master URLs loop, and testing the *last* 3 .ts URLs
PLAT-1571 #time 6h
Merge pull request #1473 from kaltura/IX-9.20.0-PLAT-1571

Refactored DeliveryProfileLiveAppleHttp::checkIsLive()