Remove time stub in test teardown

ActiveSupport::Testing::TimeHelpers does not include auto removal of
this type of stubs in test teardowns for now.
Remove matching system
Merge pull request #630 from neighborly/im-remove-matching

Remove matching system
Migrate database
merge branch 'master' into jl-new-select-maturity

Conflicts:
	app/locales/pages/projects/contributions/new.en.yml
	app/views/projects/contributions/new.html.slim