correctly unnest channel config

While we were storing the correct self.data for nested channel
configs, we weren't actually using self.data to when we attempted to
connect to irc channels. Fixup the data variable early enough that IRC
channel connection in the ER bot should work again.

Change-Id: I2758fb79e3b424def53415d6fdc41fbc99d0ca9f
Merge "correctly unnest channel config"