guestfish_block_dev: Add 3 scrub related cases

1.scrub-device
2.scrub-device
3.scrub-freespace
guestfish_block_dev: Add md device related case

1. md-create
2. md-detail
3. md-stop
4. md-stat
5. list-md-devices
guestfish_block_dev: Add part_add, part_del, part_init cases
Add test cases for:
    1. Attach disk of special disk name
    2. Audit log check after detach
    3. Disk type check after attach
tp-libvirt: Add option(managedsave and snapshot) test for undefine

Signed-off-by: Li Yang <liyang.fnst@cn.fujitsu.com>
Improve disk hotplug/hotunplug audit test.
Improve audit check function.
guestfish_block_dev: Add cases to test API

part-set-bootable
part-get-bootable
part-set-mbr-id
part-get-mbr-id
Merge pull request #126 from vanbogithub/bfan-dev

Add some scrub and md device related cases
Merge pull request #130 from rbian/master

Add test cases for virsh at/dttach-disk:
libvirt.test: Fix a bug in setvcpus test

Signed-off-by: Li Yang <liyang.fnst@cn.fujitsu.com>
Merge pull request #136 from liyangfnst/setvcpus_fix

libvirt.test: Fix a bug in setvcpus test
Merge pull request #129 from liyangfnst/dumpxml_opt

libvirt.test: Add '--managed-save' and '--snapshots-metadata' test for undefine
virsh schedinfo: Add cases for --set {--config|--live|--current}

Signed-off-by: Dongsheng Yang <yangds.fnst@cn.fujitsu.com>