resolve merge conflicts of 43c3a7e5 to nyc-mr1-dev
am: d958f83a01

* commit 'd958f83a017dde230203d91c8daedf36d40c22a6':
  make the notification enqueue rate threshold a setting

Change-Id: I5172c1a0f0832f3b93d05f0ab7b7b1ab7233d334