base

Don't override the hash code for the channel.

Each channel is uniquely represented by the object itself,
so use the hash code to identify it. Using channelPath in the
calculation will mess up things - since in Connecting state the
channel path is null and when its connected, we will get a different
hash code.

Change-Id: I6af6c783e18fddbd38344432b8156e000baafb15