derive rsnvac when renewal set to yes, reset rsnvac when renewal set to no

app/models/derived_variables/lettings_log_variables.rb

@@ -48,6 +48,7 @@ module DerivedVariables::LettingsLogVariables
       self.offered = 0
       self.voiddate = startdate
       self.first_time_property_let_as_social_housing = 0
+      self.rsnvac = 14
       if is_general_needs?
         # fixed term
         self.prevten = 32 if managing_organisation&.provider_type == "PRP"

app/models/lettings_log.rb

@@ -518,6 +518,7 @@ private
   def reset_derived_questions
     dependent_questions = { waityear: [{ key: :renewal, value: 0 }],
                             referral: [{ key: :renewal, value: 0 }],
+                            rsnvac: [{ key: :renewal, value: 0 }],
                             underoccupation_benefitcap: [{ key: :renewal, value: 0 }],
                             wchair: [{ key: :needstype, value: 1 }],
                             location_id: [{ key: :needstype, value: 1 }] }