Reinforce cycle prevents ExpiringPBSDockingBase from expiring

[MikeJeffers]

This: https://github.com/OpenPerpetuum/PerpetuumServer/blob/Development/src/Perpetuum/Zones/PBS/DockingBases/ExpiringPBSDockingBase.cs#L70 Is insufficient to allow Kill() to invoke successfully as the reinforcement state explicitly prevents it