tree 546c46fab1c1ab0ebbdf3ceb290fad77f3f5b9d8
parent 1ec4166b62c37c5b6fbc814fb28c370eb272cda4
author Madan Jampani <madan@onlab.us> 1416462704 -0800
committer Yuta Higuchi <y-higuchi@onlab.us> 1416507310 -0800

1. Adds a lockAsync method to LockService for async lock acquisition.
2. Fixes a bug where lock() wasn't attempting a tryLock before registering for lock avalilability.
(Note 1 above is needed for LeadershipService which will come later)

Change-Id: I1deaa445f7cdf86416b335df1d7358e17eff19c3