Sync lockutils from oslo-incubator stable/grizzly.

Changes include:

3cb71ff Locking edge case when lock_path does not exist
21925b6 Fix locking issues in Windows
547ab34 Fix Copyright Headers - Rename LLC to Foundation

Fix bug 1158179.

Change-Id: I0d5fb58bef593233068accfcea0dff9fa05f61ef

cinder/openstack/common/lockutils.py

@@ -207,7 +207,6 @@ def inner(*args, **kwargs):
                             local_lock_path = tempfile.mkdtemp()
 
                         if not os.path.exists(local_lock_path):
-                            cleanup_dir = True
                             fileutils.ensure_tree(local_lock_path)
 
                         # NOTE(mikal): the lock name cannot contain directory