libvirt.tests: Support migration job for domjobabort test.

Signed-off-by: Yu Mingfei <yumingfei@cn.fujitsu.com>
libvirt.tests: Support verification for migrate compcahce test.

Signed-off-by: Yu Mingfei <yumingfei@cn.fujitsu.com>
libvirt.tests: Add testcase of compressed option for migrate.

Signed-off-by: Yu Mingfei <yumingfei@cn.fujitsu.com>
libvirt.tests: Add scsi disk test for virsh.migrate.

Signed-off-by: Yu Mingfei <yumingfei@cn.fujitsu.com>
libvirt.tests: Add compressed migration for stress tests.

Signed-off-by: Yu Mingfei <yumingfei@cn.fujitsu.com>
Merge pull request #269 from yumingfei/migration_complementary

Migration complementary: Add some testcases about job.