CBQE-0: update logs in RemoteMachineShellConnection

on windows it's difficult to investigate the issues with instllation, upgrade, etc. ssh tasks

Change-Id: I4460b996d5d9cf2880f55e853d0523f83438ced0
Reviewed-on: http://review.couchbase.org/32413
Reviewed-by: Andrei Baranouski <andrei.baranouski@gmail.com>
Tested-by: Andrei Baranouski <andrei.baranouski@gmail.com>