tree 0666201b3cce7d1acb55ef05b96654440bf8c6ca
parent bcd30b17108c5a2eb2b861efc70c68c2834313d6
author Nikolay Titov <nikolay.titov@nokia.com> 1503506517 -0400
committer Niren Chidrawar <niren.r.chidrawar@nokia.com> 1503513952 -0700

VOL-383: xpon_agent throws AttributeError and KeyError Exception at create_channel_termination

xpon agent throws such errors when attempting to configure xpon interface without referencing its parent.
As a result while seaching for device ID utilizing parent-child relationship datastructure, it returns empty list for its parent and consequently attempts to find its parent.
For VOLTHA 1.0, make all of the reference mandatory until VOL-314 & VOL-356 are implemented.

Change-Id: Ibf01572c190323979b3beb114b9c760205c717e2