Low: remote: Downgrade proxy relay failure to a debug msg

We don't want to see these errors if the remote client
disconnects before the response comes in.
Low: cts: Verify libvirtd is up before running pacemaker remote tests.
Low: cts: Don't remove lxc config files during pcmk remote tests
Low: cts: Distribute lxc config files to all nodes in cluster so monitors do not fail
Merge pull request #347 from davidvossel/pcmk_remote_cts

more pcmk remote and cts fixes