win_virtio_driver_update: fix issue of reboot twice after downgrade driver

1. after driver downgrade test, vm is rebooted twice.
2. add enable driver verifier step.
Signed-off-by: NXiaoling Gao <xiagao@redhat.com>

When L1 guest starts up slow will get SCP error

nvdimm_hotplug: add new case to test hotplug nvdimm device

Signed-off-by: NQinghua Cheng <qcheng@redhat.com>

Signed-off-by: NYumei Huang <yuhuang@redhat.com>

qemu_guest_agent: fix bug of qga pkg installation

Sometimes the latest module comes out,
but qemu-guest-agent pkg is not ready, so it will
induce test fail.
Signed-off-by: NXiaoling Gao <xiagao@redhat.com>

block_devices_plug: Fix support pci bus specified

hotplug_mem_negative: Fix 'no valid keyword' issue

In case overcommit_host_mem, overcommit_mem need not exceed maxmem,
otherwise, keywords won't match. Fix it by set maxmem to a large
value.
Signed-off-by: NYumei Huang <yuhuang@redhat.com>

Support the pci bus specified on creating block devices.
Signed-off-by: NYongxue Hong <yhong@redhat.com>

Find unused loop device as image device

qemu_guest_agent:bug fix of hotunplug blockdev dev

Fix using static /dev/loop6 issue.
Signed-off-by: Nqingwangrh <qinwang@redhat.com>

hv_kvm_unit_test: Add unit test for hyper-v

Hyper-V testdev device test via kvm-unit-tests
Signed-off-by: NYu Wang <wyu@redhat.com>

Block hotunplug method is changed for blockdev backend.
Signed-off-by: NXiaoling Gao <xiagao@redhat.com>

hugepage_specify_node: fix 'NoneType' object has no attribute 'cleanup'

Fix unattend install issue for cd-rom installtion

usb_controller: restrict uhci/ehci controllers only cover boot/reboot cases

Add one case for enable/disable multi queues repeatedly

Fix data plane on scsi_cd issue

Signed-off-by: Nqingwangrh <qinwang@redhat.com>

Adopt Avocado cpu library changes

virtio_fs_multi_vms: New cases to test virtio-fs with VMs and daemons

virtio_fs_readonly: New case to test virtio-fs with read-only

1.restrict uhci/ehci controllers only cover boot/reboot cases
2.correct usb_type_usbtest for qemu-xhci
Signed-off-by: Nybduan <yduan@redhat.com>

nvdimm_mode: Add new case to test change nvdimm mode inside guest

Signed-off-by: NYumei Huang <yuhuang@redhat.com>

slof_user_interface: Add two cases for slof

1.Reboot a guest after enable/disable multi queues repeatedly
Signed-off-by: NLei Yang <leiyang@redhat.com>

The reason is scsi-cd can not attatched scsi bus which enabled
data plane.
Signed-off-by: Nqingwangrh <qinwang@redhat.com>

block_devices_plug: Support plug secret object

rngd_status: wait for a reasonable time to get correct rngd status

Signed-off-by: NYongxue Hong <yhong@redhat.com>

Now and then it takes a short time interval for rngd status becomes
'active (running)' after booting up when using rng-egd backend.
Once we do the next step in this situation, starting rngd, it will
get stuck. So wait for a reasonable time to get correct rngd status.
Signed-off-by: Nybduan <yduan@redhat.com>

hp_config is an example of HugePageConfig().setup() method,
so there is no cleanup() object.
Change hp_config to an instance of HugePageConfig(),
so that hp_config contains both .setup() and .cleanup().
Signed-off-by: NZhenyu Zhang <zhenyzha@redhat.com>

virtio_fs_share_data: New cases to test virtio-fs by sharing data

gluster_peers is a string in json