PLAT-1086 - playReady flavors of audio only get Not Applicable status
Prevented setting of NA flag for audio-only asset that has other assets
as source prerequisits (flavor::getSourceAssetParamsIds)
Merge pull request #985 from kaltura/IX-9.13.0-PLAT-1086-NA-audio-only

PLAT-1086 - playReady flavors of audio only get Not Applicable status