Refactor to use #next_node_if
Refactor to use #next_node_if

also took advantage of next_node_calculation to simplify some of the
logic/calculations. Changed the text of the
outcome_age_limit_reached_payment outcome to use a more semantically
meaningful variable name.
Refactor to use #next_node_if
Refactor to use #next_node_if
Refactor to use #next_node_if
Refactor to explicitly declare possible next nodes

It's hard to convert this flow to use next_node_if due to the way that
the next node is computed from the list of benefits selected.
Refactor to use #next_node_if
Fix whitespace
Refactor to use #next_node_if
Refactor to use #next_node_if
Add response_is_only predicate
Change maternity-calculator-v2.rb shared logic to use #next_node_if
Newline at end of file