Update drive_mirror test configuration to make it stablly

changes from v1:
    fix some coding style issue
Signed-off-by: NXu Tian <xutian@redhat.com>

The test add by commit 4436fb03c30317597848a7ea7e87577b90582aa9 and it
only support human monitors commands; This commit split sub-test in
this commit into two case and refactor it with exist test framework to
make it support both QMP monitor and  windows guest;
Signed-off-by: NXu Tian <xutian@redhat.com>

* Fix incorrect command when run test with qmp monitor;
* Fix logical error that target image file should not
  be opened before the reopen step;
* Merge configuration file into drive_mirror.cfg
* Use by default upstream block mirror names rather than
  assuming RHEL block mirror names.
Signed-off-by: NLucas Meneghel Rodrigues <lmr@redhat.com>
Signed-off-by: NXu Tian <xutian@redhat.com>

Signed-off-by: NLucas Meneghel Rodrigues <lmr@redhat.com>

So it won't conflict with the existing reboot and powerdown
tests.
Signed-off-by: NLucas Meneghel Rodrigues <lmr@redhat.com>

Signed-off-by: NXu Tian <xutian@redhat.com>