The change extends LFS serve regex so that the following operations are
handled (according to [1]):
POST /locks - create lock
GET /locks - list locks
POST /locks/verify - list locks for verification
POST /locks/lock_id/unlock - delete lock
Common LFS definitions, like paths, regexps, content type, etc., were
moved to gerrit-extension-api so that they can be shared between Gerrit
core and LFS plugin.
[1] https://github.com/git-lfs/git-lfs/blob/master/docs/api/locking.md
Change-Id: I8299000c827b5a34d6de1ed5fc650f74be4164a2
Signed-off-by: Jacek Centkowski <jcentkowski@collab.net>
8939ee8602