add validation for fileSync PLAT-4818 #0.5d
add validation for fileSync
PLAT-4818 #0.5d

kaltura/server,kaltura/server,DBezemer/server,DBezemer/server,kaltura/server,DBezemer/server,kaltura/server,DBezemer/server,DBezemer/server,DBezemer/server,DBezemer/server,DBezemer/server,kaltura/server,kaltura/server