Add iozone/reboot/shutdown test after hotplug a data disk

fix some bugs and add steps for ping.py 

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>

improve ping from host to guest, add ping exceed/flood for guest to host,add windows support for multi_nics and fix some bugs in this patch.
Signed-off-by: NYu Wang <wyu@redhat.com>

viorng_in_use: Live migration while rng device in use

generic.tests: for test lvm, remount lv for sub test "fillup_disk" and "ioquit" after guest reboot/shutdown

numa_opts: Update default memory size for 3 nodes test

qemu_guest_agent: add case about install/uninstall qemu-ga package for windows guest.

1.add case for install/uninstall qemu-ga-xx.msi repeatly.
2.fix unreferenced params issue.
Signed-off-by: NXiaoling Gao <xiagao@redhat.com>

multi_nics_stress: add dhclient to get new added nics ip

rng_host_guest_read:Host and guest read data at the same time

Add a new case to support host and guest read random numbers at
the same time.
Signed-off-by: NLi Jin <lijin@redhat.com>

add a pre_cmd to dhclient ip before netperf
Signed-off-by: NYu Wang <wyu@redhat.com>

Add with_live_migration variant to support live migraion during
virtio rng is in use.
Signed-off-by: NLi Jin <lijin@redhat.com>

migrate.cfg: fix migrate.between_vhost_novhost cannot run on RHEL7 host

rh_kernel_update: updated kernel_re and knl_dbginfo_re

Make kernel_re and knl_dbginfo_re more strict to avoide updating
guest kernel to unstable versions.
Signed-off-by: NHaotong Chen <hachen@redhat.com>

usb_device_check: add check max_devices_under_one_hub and mouse/tablet/kbd cases

Modified imported modules to make it compatible with both
python 2.6 and 2.7
Signed-off-by: NHaotong Chen <hachen@redhat.com>

Keep consistent report with x86 for ppc platform.

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

Update cmd of read_rng_cmd

Signed-off-by: NSuqin Huang <shuang@redhat.com>

qemu.tests.nvdimm: Avoid "nvdimm_dax" be referenced before assignment

Signed-off-by: NYanan Fu <yfu@redhat.com>

qemu_guest_agent: modify the qemu_guest_agent code structure for qemu-ga installation.

There is no need to run installation step for every test case.
Signed-off-by: NXiaoling Gao <xiagao@redhat.com>

block_resize: add support for data plane

Signed-off-by:Aihua Liang<aliang@redhat.com>

nvdimm.nvdimm_dax: add new case: check nvdimm in guest backed by /dev/dax0.0

1.Remove irq_injs and rpkt_per_irq since it's not supported any
more in kvm state

2.Since powerpc doest not support io_exits in kvm state, uses exits
for all platform.

3.Fail to control last numa node by numactl tool in some ppc machine,
so switch to node 0 instead.
Signed-off-by: NWenli Quan <wquan@redhat.com>

multi_disk_install: add parameters for system disk

               after guest reboot/shutdown
Signed-off-by: NXueqiang Wei <xuwei@redhat.com>

nic_hotplug.py: fix serial console conflict

Conflict will happen if we try to open a new serial console instance
while there is already a activated instance existed from the same console
object. Updated the serial console operation here to get rid of this kind
of conflicts.
Signed-off-by: NZhengtong Liu <zhengtli@redhat.com>

qmp_command: update check method of "query-name","query-uuid"and "human-monitor-command"

usb_mouse checks a usb mouse attached to the bus without usb hub.
usb_mouse_and_tablet checks a usb mouse and tablet without usb hub.
usb_kbd checks a usb keyboard without usb hub.
Signed-off-by: NHaotong Chen <hachen@redhat.com>

It checks 8 usb mouses attached to a usb hub.
Signed-off-by: NHaotong Chen <hachen@redhat.com>

Add usb hub negative tests

Signed-off-by: Nyduan <yduan@redhat.com>