autotest/autotest — pull request #139 by ypu (2012-01-13 11:59:01+00:00)
Title: virt test: Change finish.exe to finish.bat in unattended_install

Use finish.bat to send the finish signal after install instead of
finish.exe:
- finish.exe will send signal through network, and sometimes it
will failed with network problem.
- Some commands run after install may return before exit which
may make the commands failed to install or setup env as we expect.
Add a process check loop in finish.bat to make sure specific
process is finished before halt.

Signed-off-by: Yiqiao Pu