Bug 1817 - Add in ietf-restonf to the yangtools-models feature.

Change-Id: Ic50f22d678eadc3024abe9b1adeeb0308742e0d3
Signed-off-by: Devin Avery <devin.avery@brocade.com>
Merge "Bug 1817 - Add in ietf-restonf to the yangtools-models feature."