1. Boot a guest with a data disk
2. Format new added data disk
3. Run fio on both system disk and data disk
Signed-off-by: Npeixiu <phou@redhat.com>

fix typo error and improve finally, otherwise it will cover the key error
update test_timeout to cmd_timeout, as the name params test_timeout
is the same as job timeout
Signed-off-by: NSuqin Huang <shuang@redhat.com>

Signed-off-by: NShuping Cui <scui@redhat.com>