Sync lockutils from oslo-incubator stable/grizzly.
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: I8231a6d37b70c36ba2ce245407b02698faa55aaf

Triv90/Nova,yrobla/nova,Triv90/Nova,yrobla/nova,Triv90/Nova,yrobla/nova