Commandbook conflicts with Clearlag

CMDBOOK-2436 - Reported by Dats_me

Commandbook 2.4 & 2.5 causes Clearlag -->KeepDeathDrop to stop working.
ClearLag's auto clear and manual clear commands removes players deathdropped items.
Disable Commandbook and it works correctly (does not delete death dropped items).

Versions tested and able to duplicate with:
CommandBook v2.5-SNAPSHOT.1769-eb34539
CommandBook v2.4:1692-75bb1c8,master
ClearLag v2.8.3
KeepDeathDrop v1.0.2

Reproduce the conflict using CommandBook 2.4 or 2.5, ClearLag 2.8.3, and KeepDeathDrop 1.0.2, comparing ClearLag's automatic and manual clearing with CommandBook enabled and disabled. Done means ClearLag no longer removes players' death-dropped items.

Scritto dal modello di indicizzazione a partire dal testo della issue.