shared.control.fio: Do not handle --args parameter in control file.

Now we support update args by directly update the control file.
So no need handle the --args in control file now.

Signed-off-by: Feng Yang <fyang@redhat.com>
virttest.utils_test: Do not add args parameter in autotest-local command.

In run_autotest() function, we do not need add args parameter in
guest's  autotest-local command.
Now we support args parameter by directly update the control file used
in guest. So need not add args parameter in guest's  autotest-local
command again.

Signed-off-by: Feng Yang <fyang@redhat.com>
Merge pull request #1823 from FengYang/run_autotest

Update run_autotest function