Encapsulation of a critical telecommand that must be executed according to an "arm-fire" protocol. Execution of the actions
associated to this telecommand must be performed in two steps. First, an "arm" request is received and then a "fire" request
received. The telecommand actions are executed only after both the arm and the fire requests have been received and only if
two requests satisfy certain constraints (e.g. separation in time less than a certain threshold).
Telecommand Management design pattern.