lxd/cluster: Don't mask lack of cluster response
lxd/cluster: Don't mask lack of cluster response

Regardless of what state a cluster member is in, it's failure to respond
to hearbeats should be reported in the status message.

This is particularly visible when evacuating servers as prior to this
change, it was impossible to know if the server was responsive or not.

Signed-off-by: Stéphane Graber <089afc6d81f66f1168a9849e15660feae286e024@ubuntu.com>

stgraber/lxd,stgraber/lxd,stgraber/lxd,hallyn/lxd,stgraber/lxd,lxc/lxd,hallyn/lxd,lxc/lxd,hallyn/lxd,hallyn/lxd,stgraber/lxd,hallyn/lxd,lxc/lxd,stgraber/lxd,stgraber/lxd,hallyn/lxd,lxc/lxd,lxc/lxd,lxc/lxd,lxc/lxd