utils_test: Replace autotest with new autotest-local.

Signed-off-by: Yu Mingfei <yumingfei@cn.fujitsu.com>
Merge pull request #1655 from rbian/master

Add function for checking disk type in vm xml.
Merge pull request #1653 from yumingfei/stress_update

utils_test: Replace autotest with new autotest-local.