lib/oeqa/utils/qemurunner.py: class to handle qemu instance
Handles qemu instances (launch, kill, restart, serial connection, logging)
Launch is blocking until login prompt and returns to the task. A qemu
serial connection is used to save the boot log and get the ip from the image.
Changed runqemu script not to error out when using custom serial option.
Signed-off-by: Radu Moisan <radu.moisan@intel.com> Signed-off-by: Stefan Stanacar <stefanx.stanacar@intel.com>
