Spigot patch update: Spigot Changes: Yet another CraftBukkit pulled patch.

EcoCityCraft/Spigot@165164f5ab311057efc9a05588231ec89642de2c

Note: this commit merely synchronizes our code with the upstream projects (Spigot and CraftBukkit)
Don't do physics updates in world generation. Fixes BUKKIT-3747

Remapped by Srg2Source from Bukkit/CraftBukkit@7fd3e344c04df99bd0f0066be2114799f6ef78c4