tree aff93898855057bf1752c7ec06c79a04359076f3
parent 7964fce84bd4ba0e3021a9386d8c7df33b58c59d
author Sho SHIMIZU <shimizu.sho@jp.fujitsu.com> 1463683096 -0700
committer Gerrit Code Review <gerrit@onlab.us> 1464724256 +0000

Add a DiscreteResources sub type representing an empty set

This is for ONOS-4281

Change-Id: Ic4b6e2f00555681bb2af39dc1cf764d325ae8744
(cherry picked from commit abdf2df31ce11ed1fa8ee3ee83c6df41dbb2be4e)