[Task] Fix queued task cancellation
[Task] Fix queued task cancellation

When the action callback failed and it returns 'failed' parameter set to FALSE,
the queued task was not completed and the process blocked.

Signed-off-by: Ludovic Ferrandis <22de32f469b6975001fde4e8fec94685fb50d109@intel.com>

puleglot/dleyna-core,rmerlino/dleyna-core,d99roric/dleyna-core,UIKit0/dleyna-core,lferrandis/dleyna-core,KobaltRo/dleyna-core-1,puleglot/dleyna-core,jku/dleyna-core,d99roric/dleyna-core,rmerlino/dleyna-core,rmerlino/dleyna-core,KobaltRo/dleyna-core,KobaltRo/dleyna-core,UIKit0/dleyna-core,lferrandis/dleyna-core,KobaltRo/dleyna-core-1,01org/dleyna-core,jku/dleyna-core,01org/dleyna-core