tree aab1d4973d4b843898122b3b3865c2b7ecbe2a17
parent c672c984e80f4b1296125ba032b4e29b179e404e
author Frank Wang <wangpeihuixyz@126.com> 1500533196 +0800
committer Carmelo Cascone <carmelo@opennetworking.org> 1500563413 +0000

change the way ImmutableBiMap is created for subsequent expansion

Change-Id: I87d631513a8eb859d597e38c2be9c201b1546440