block_hotplug:
1.replace hotplug device definations by qcontainer.images_define_
by_params()
2.remove useless options in block_hotplug.cfg
3.replace hotplug/verify_hot|unplug by simple_hot|unplug()
4.extract sub_tests to run_sub_test()
Signed-off-by: NAihua Liang <aliang@redhat.com>

Signed-off-by: NXu Han <xuhan@redhat.com>

Signed-off-by: NXu Han <xuhan@redhat.com>

Add subtest "block_resize" after hotplug.
Signed-off-by: NAihua Liang <aliang@redhat.com>

If the vm is truly crash/dead, original code will return directly, which is not expected. Only for screnaio 'shutdown' could return directly, others should prompt guest dead error info which is already added in the framework.
Signed-off-by: NCong Li <coli@redhat.com>

block_hotplug:add code to unplug virtio-scsi-pci.
Signed-off-by: NAihua Liang <aliang@redhat.com>

data plane support for case "with_plug.with_system_reset.one_pci"
Signed-off-by: NAihua Liang <aliang@redhat.com>

Run iozone test on hotpluged data disk on windows guests.
Add test case reboot and shutdown guest after hotplug a data disk.
Signed-off-by: Npeixiu <phou@redhat.com>

1. block_hotplug.cfg: add separate scenario for repeated plug/unplug, no need repeat 300 times for each scenario when one pci.
2. block_hotplug.py: get and close a separate session when using it to fix file descriptor out of range problem.
3. stop_continue.py: close session when test finished.
Signed-off-by: NCong Li <coli@redhat.com>

Add new case for block_hotplug, support block_virtio and
block_scsi with hotplug/unplug.
Signed-off-by: NShuping Cui <scui@redhat.com>