Close channel and keep stomp client open

We want to use high level retry instead of closing the client. We need
to make sure that client is not stopped. We need to close a socket
channel and rely on retry logic to reconnect when needed.

Bug-Url: https://bugzilla.redhat.com/1115044
Change-Id: I08e7564e4ffb673fdee94ef89e7266ee5f822bf0
Signed-off-by: pkliczewski <piotr.kliczewski@gmail.com>