Log: libpe_status: downgrade remote node fence-before-clear message

Previously, check_operation_expiry() would order remote node fencing
before clearing of the connection fail count (and log a notice) when
the remote node was unclean.

However, at the point that is called, the nodes are always unclean
(link_rsc2remotenode() sets unclean after unpacking resources, and
unpack_node_loop() won't clear it until after unpacking status).

Now, skip the unclean check (it is always true, and not completely
necessary since the fence op is created as optional), and lower
the log message to info.