drive_mirror tests: small cleanups

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

qemu/tests/drive_mirror_powerdown.py

@@ -37,7 +37,7 @@ class DriveMirrorPowerdown(drive_mirror_stress.DriveMirrorStress):
         params = self.parser_test_args()
         image_file = params.get("image_file")
         target_image = params.get("target_image")
-        cmd = "yes|mv %s %s" % (target_image, image_file)
+        cmd = "mv -f %s %s" % (target_image, image_file)
         error.context("copy target image")
         utils.system(cmd)
         error.context("powerup vm with target image", logging.info)
@@ -47,7 +47,7 @@ class DriveMirrorPowerdown(drive_mirror_stress.DriveMirrorStress):
         params = self.parser_test_args()
         image_file = params.get("image_file")
         super(DriveMirrorPowerdown, self).clean()
-        cmd = "yes|mv %s-bak %s" % (image_file, image_file)
+        cmd = "mv -f %s-bak %s" % (image_file, image_file)
         utils.system(cmd)
 
 def run_drive_mirror_powerdown(test, params, env):

qemu/tests/drive_mirror_stress.py

@@ -35,13 +35,13 @@ class DriveMirrorStress(drive_mirror.DriveMirror):
     @error.context_aware
     def load_stress(self):
         """
-        load IO/CPU/Memoery stress in guest;
+        load IO/CPU/Memory stress in guest;
         """
         params = self.parser_test_args()
         self.install_stress_app()
         cmd = params.get("start_cmd")
         session = self.get_session()
-        error.context("lanuch stress app in guest", logging.info)
+        error.context("launch stress app in guest", logging.info)
         session.sendline(cmd)
         logging.info("Command: %s" % cmd)
         runing = utils_misc.wait_for(self.app_runing, first=0.5, timeout=300)