parser: Use 'objects.create' instead of 'save'

parser: Use 'objects.create' instead of 'save'

As noted in the Django documentation [1], this lets us do things in one
step.

[1] https://docs.djangoproject.com/en/dev/topics/db/queries/#creating-objects

Signed-off-by: Stephen Finucane <stephen@that.guru>
Acked-by: Daniel Axtens <dja@axtens.net>