Fix exception logic

[hakbailey]

solenoid/solenoid/elements/xml_handlers.py

Line 115 in 1c186f3

if 'Waiver' not in exceptions:

This only checks for whether "Waiver" is in the exceptions list, and requests the paper anytime "Waiver" is in the list, even if there are also other exceptions. It should only request the paper if "Waiver" is the only exception.