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.
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
guestfish_block_dev: Add 5 part-* test case

part-list, part-disk, part-get-parttype, part-to-dev, part-to-partnum