tree c6f7191eecb843fc0706729ca87220b234ee14c4
parent 62f4893063cea05be4ded1d90bafea62f4673761
author Sangho Shin <sangho@onlab.us> 1417818938 -0800
committer Sangho Shin <sangho@onlab.us> 1417823199 -0800

Modify createGroup and removeGroup for tunnel to handle multiple instances
 - createGroup() of the driver returns a list of group IDs
 - removeGroup() removes only the group specified
 - Application removes all the groups for the tunnel