Create a system for database migrations based on DB version

[Gehock]

Basically make this code redundant and convert the old DB when it is loaded for the first time:

operationbot/roleGroup.py

Lines 100 to 107 in 4a4d001

	# TODO: this should be handled in EventDatabase instead based on the DB
	# version
	def get_corrected_name(self, roleData):
	if "displayName" in roleData:
	show_name = roleData["displayName"]
	else:
	show_name = roleData["show_name"]
	return show_name