qemu: drive_mirror - Replace qmpmonitor1 with qmp1

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

qemu/tests/cfg/drive_mirror.cfg

@@ -5,8 +5,8 @@
     only qcow2
     type = drive_mirror
     monitor_type = qmp
-    monitors = qmpmonitor1
-    main_monitor = qmpmonitor1
+    monitors = qmp1
+    main_monitor = qmp1
     backup_image_before_testing = yes
     restore_image_after_testing = yes
     block_mirror_cmd = "__com.redhat_drive-mirror"