Fix notice on is_quick_config

Fix notice on is_quick_config

is_quick_config is only assigned when a payment is being made on an existing
contribution - this was a bit hard to figure out so I switched to using
a variable that explicitly says what it means (rather than guess at ccid)
and ensured that is_quick_config was only accessed within these blocks

Also, I pulled the assignment on the Dummy processor name from out of
the unrelated function