virttest.utils_test.__init__: Add detail error log in get_time()

Also PEP8 fixes in get_time function

Signed-off-by: Feng Yang <fyang@redhat.com>
shared.cfg.guest-hw: Add raw_dd variant.

This variant test raw image which created by dd command.

Signed-off-by: Feng Yang <fyang@redhat.com>
qemu.cfg.virtual_nic_send_buffer: Update configure for netperf_udp sub case.

We change to use netperf under shard/deps folder by default in netperf_udp.
So update virtual_nic_send_buffer.

Signed-off-by: Feng Yang <fyang@redhat.com>
qemu.cfg.host-kernel: Set nettype to bridge when vhost used

vhost only works nettype = bridge

Signed-off-by: Feng Yang <fyang@redhat.com>
Merge pull request #1127 from FengYang/update7

Some update and fix master tree - Update7