Fixed PHP-1059: updatedExisting always true

The updatedExisting field should always be set - but only when upserted is not set and n > 1 it is true
Merge pull request #666 from bjori/update-existing

Fixed PHP-1059: updatedExisting always true

* bjori/update-existing:
  Fixed PHP-1059: updatedExisting always true
Merge branch 'v1.5'

* v1.5:
  Fixed PHP-1059: updatedExisting always true