qemu: drive_mirror - Replace qmpmonitor1 with qmp1

Signed-off-by: Lucas Meneghel Rodrigues <lmr@redhat.com>
physical_resources_check: Skip machine type checking even on RHEL

The cmd to perform machine type checking on RHEL apparently
gives nothing on our RHEL guests (tested with RHEL6.3). So
skip this, and I'm waiting for an up to date definition
that actually works on guests, such as restricting the check
to RHEL 6.4 guests, for example.

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