adding qemu sandboxing option

Adding new command line argument to "./run" script: "-s,--qemu_sandbox".
It enables the Qemu command line argument "-sandbox on", running all
tests with the system call filter turned on.

Signed-off-by: Eduardo Otubo <otubo@linux.vnet.ibm.com>
virttest.utils_net: Support multiqueue macvtap

This patch make autotest support multiqueue Macvtap

Signed-off-by: Yunping Zheng <yunzheng@redhat.com>
Add msix vectors support

Signed-off-by: Yunping Zheng <yunzheng@redhat.com>

Conflicts:
	virttest/qemu_vm.py
tests.nic_hotplug: make nic_hotplug support msix vectors

Support a nic with msix vertors

Signed-off-by: Yunping Zheng <yunzheng@redhat.com>
test.multi_queues_test : Add some tests for multi queues

This patch add some tests for multi queues.

Signed-off-by: Yunping Zheng <yunzheng@redhat.com>

Conflicts:
	tests/enable_mq.py
qemu.test.virtual_nic_send_buffer: Some modification

Make file transfer support tcp, udp or both.
Add netperf_udp burst test
ignore errors when deleting the test file on host and guest.

Signed-off-by: Yunping Zheng <yunzheng@redhat.com>