rando: Change optErrMsg to a list
rando: Change optErrMsg to a list

Changed optErrMsg from a string to a list.  This cleans up randomizer.py
a bit and will make future refactoring a little easier.

theonlydude/RandomMetroidSolver,theonlydude/RandomMetroidSolver,theonlydude/RandomMetroidSolver,theonlydude/RandomMetroidSolver,theonlydude/RandomMetroidSolver