autotest/virt-test — pull request #794 by xutian (2013-08-28 09:00:11+00:00)
Title: Fix long arguments issue

Arguments too long error when run 'virtio_scsi_variants.multi_scsiid_lun' testing, because many disks used in vm to make guest boot command line is so long that shell can't execute it directly;
This patch will save long command( length of command more that 255 character) to tempfile, then execute it by 'source $tempfile' to avoid too long arguments error;