tree c2ab3f6a50d4db6a93de2bdcc6dec20d5cc1d0d1
parent 0fa8787e599d711116afd90d5ca6cc9009973a83
author DongRyeol Cha <dr83.cha@samsung.com> 1578534908 +0900
committer Thomas Vachuska <tom@opennetworking.org> 1578687342 +0000

Add a exceptional port number to do not display port number

The PortNumber class always displays numeric value if it has name.
But in some case, we don't want to display numeric value.

This patch provide this behavior.

Change-Id: I3d91742594c4aef7eaa103190159605aed31e2a0