tasks/kclient: add 'debug' option

Signed-off-by: John Spray <john.spray@redhat.com>
suites/fs: hook in mds_full task

Signed-off-by: John Spray <john.spray@redhat.com>
suites/kclient: hook in mds_full task

Signed-off-by: John Spray <john.spray@redhat.com>