Added a temporary script to update slugs on staging.
Added a temporary script to update slugs on staging.

I toyed with the idea of popping this in a migration but have decided against it.  I've tested this script locally against a replica of the staging data and it appears to behave as expected.  I'll commit, deploy and execute the script before removing it again.

ggoral/whitehall,robinwhittleton/whitehall,askl56/whitehall,ggoral/whitehall,YOTOV-LIMITED/whitehall,hotvulcan/whitehall,robinwhittleton/whitehall,ggoral/whitehall,hotvulcan/whitehall,askl56/whitehall,robinwhittleton/whitehall,YOTOV-LIMITED/whitehall,askl56/whitehall,alphagov/whitehall,hotvulcan/whitehall,askl56/whitehall,alphagov/whitehall,alphagov/whitehall,ggoral/whitehall,YOTOV-LIMITED/whitehall,alphagov/whitehall,YOTOV-LIMITED/whitehall,robinwhittleton/whitehall,hotvulcan/whitehall