[s390,kernel] move /proc/misc collection to kernel plugin

Signed-off-by: Bryn M. Reeves <bmr@redhat.com>
[s390] remove "find /sys" from plugin

Signed-off-by: Bryn M. Reeves <bmr@redhat.com>
[libvirt] restrict configuration and log collection

Collect specific libvirt configuration and log files by glob
instead of scoopting up whole directories from /etc and /var and
add blacklisting for the libvirt SASL authentication databases.

Signed-off-by: Bryn M. Reeves <bmr@redhat.com>