handle unrecognized messages

We need to handle messages that we do not know by logging proper message
and closing the connection and we do not want any throwables to kill I/O
thread.


Change-Id: I4f51dfb68c238e6f93cdb4c256e0ad1c06543cd2
Bug-Url: https://bugzilla.redhat.com/1152191
Signed-off-by: pkliczewski <piotr.kliczewski@gmail.com>