[Nicolas] add reek gem for code smell and more DonationModule refactoring
[Nicolas] add reek gem for code smell and more DonationModule refactoring

Conflicts:
	Gemfile

fightforthefuture/Platform,fightforthefuture/Platform,PurposeOpen/Platform,PurposeOpen/Platform,PurposeOpen/Platform,PurposeOpen/Platform,fightforthefuture/Platform