PLAT-22600-new-FetchNextJob
PLAT-22600-new-FetchNextJob

the current KChunkedEncodeMemcacheScheduler::FetchNextJob causes low AWS pods utilzation 
when number of pods exceeds 200.

new func uses memcache another approach, taking advantage of memcache add func 'atomic' operation
kaltura/server,kaltura/server,kaltura/server,kaltura/server,kaltura/server,kaltura/server