live: call wipefs if partition or format fails

wipe disk if partition or format fails to leave the disk in consistent state.

src/live/ogOperations.py

@@ -528,7 +528,12 @@ class OgLiveOperations:
             raise OgError(f'Invalid disk number {disk}, {len(get_disks())} disks available.')
 
         diskname = get_disks()[disk-1]
-        self._partition(diskname, table_type, partlist)
+        try:
+            self._partition(diskname, table_type, partlist)
+        except Exception as e:
+            ret = subprocess.run(['wipefs', '-af', f'/dev/{diskname}'])
+            logging.warning(f'wipefs on /dev/{diskname} after failure for consistency, reports {ret.returncode}')
+            raise
 
         ret = subprocess.run(['partprobe', f'/dev/{diskname}'])
         logging.info(f'first partprobe /dev/{diskname} reports {ret.returncode}')