#66: Fixed JSON import with saved components
#66: Fixed JSON import with saved components

* No longer creates a root with file information if one already
  exists from a previously exported JSON file.

Signed-off-by: Jillian Daguil <8e927abf8e72a52d2816b020862fa1a32fbeb0d6@nexb.com>

nexB/aboutcode-manager,nexB/aboutcode-manager,nexB/aboutcode-manager