Add start date and end date to billing account endpoint used by copilots

Author: jmgasper

src/services/salesforceService.js

@@ -102,7 +102,9 @@ class SalesforceService {
           null, // fallback to null if cannot parse
         ),
         markup: _.get(o, config.get('sfdcBillingAccountMarkupField')),
-        active: _.get(o, config.get('sfdcBillingAccountActiveField')),
+        active: _.get(o, config.get('sfdcBillingAccountActiveField')),        
+        startDate: _.get(o, 'Topcoder_Billing_Account__r.Start_Date__c'),
+        endDate: _.get(o, 'Topcoder_Billing_Account__r.End_Date__c'),
       }));
       return billingAccounts.length > 0 ? billingAccounts[0] : {};
     });