ceph-disk: fix adjust_symlink() replace 'journal' with 'target'

Replace 'journal' variable with 'target' since journal doesn't
exist in this function.

Signed-off-by: Danny Al-Gaaf <danny.al-gaaf@bisect.de>

src/ceph-disk

@@ -749,7 +749,7 @@ def adjust_symlink(target, path):
                 os.unlink(path)
             elif stat.S_ISLNK(mode):
                 old = os.readlink(path)
-                if old != journal:
+                if old != target:
                     log.debug('Removing old symlink %s -> %s', path, old)
                     os.unlink(path)
                 else: