avocado.utils.lv_utils: Fix the pvs regexp

The "pvs" command adjusts to tablular output, therefor it can contain
several emply ' 's, minimum 1.
Signed-off-by: NLukáš Doktor <ldoktor@redhat.com>

avocado/utils/lv_utils.py

@@ -153,7 +153,7 @@ def vg_ramdisk_cleanup(ramdisk_filename=None, vg_ramdisk_dir=None,
     """
     errs = []
     if vg_name is not None:
-        loop_device = re.search(r"([/\w]+) %s lvm2" % vg_name,
+        loop_device = re.search(r"([/\w]+) +%s +lvm2" % vg_name,
                                 process.run("pvs", sudo=True).stdout)
         if loop_device is not None:
             loop_device = loop_device.group(1)