Wrap connection into XMPPAuctionHouse
ListViewDriver uses View directly instead of Adapter

Even if list view is not visible, Adapter.getView
returns a valid view. So the test which checks the child
view of list, it may result in false positive.
Changed Bidderview as ListView
pass Activity UI test
show Log for received message
add new test for "Join failure" (server is not running)
Introduce more detailed error cases

 * failed to connect
 * failed to login
 * failed to join

but 'join' is not check yet.
fix format