ECER-4872: Backend changes for workexperience references mapping

Author: farzadnadiri

src/ECER.Resources.Documents/ICRA/ICRARepositoryMapper.cs

@@ -68,7 +68,7 @@ public ICRARepositoryMapper()
          .ReverseMap();
 
     CreateMap<EmploymentReference, ecer_WorkExperienceRef>(MemberList.Source)
-      .ForMember(d => d.ecer_WorkExperienceRefId, opts => opts.MapFrom(s => s.Id))
+      .ForMember(d => d.ecer_WorkExperienceRefId, opts => opts.MapFrom(s => string.IsNullOrEmpty(s.Id)? null : s.Id))
       .ForMember(d => d.ecer_FirstName, opts => opts.MapFrom(s => s.FirstName))
       .ForMember(d => d.ecer_LastName, opts => opts.MapFrom(s => s.LastName))
       .ForMember(d => d.ecer_EmailAddress, opts => opts.MapFrom(s => s.EmailAddress))