Accidental fuzzy match for store types

[jonashaag]

Here https://github.com/blue-yonder/storefact/blob/f0a75afb8e8b4d633c5c2f2e8ed059bd667eaecf/storefact/_store_creation.py#L23 the code uses type in ('memory') which is identical to type in 'memory' which isn't a "look for string in list of strings" check but a "look for substring" check.