Initial fix for underlying struct mis-match bug

Update cmd/packer-sdc/internal/mapstructure-to-hcl2/mapstructure-to-hcl2.go

Co-authored-by: Lucas Bajolet <105649352+lbajolet-hashicorp@users.noreply.github.com>

cmd/packer-sdc/internal/mapstructure-to-hcl2/mapstructure-to-hcl2.go

@@ -140,10 +140,16 @@ func (cmd *Command) Run(args []string) int {
 		if !utOk {
 			continue
 		}
+
 		pos := sort.SearchStrings(typeNames, id.Name)
 		if pos >= len(typeNames) || typeNames[pos] != id.Name {
 			continue // not a struct we care about
 		}
+		// Sometimes we see the underlying struct for a similar named type, which results
+		// in an incorrect FlatMap. If the type names are not exactly the same skip.
+		if nt.Obj().Name() != id.Name {
+			continue // not the struct we are looking for
+		}
 		// make sure each type is found once where somehow sometimes they can be found twice
 		typeNames = append(typeNames[:pos], typeNames[pos+1:]...)
 		flatenedStruct, err := getMapstructureSquashedStruct(obj.Pkg(), utStruct)