Re-add pull request #655 Director deployment events

This reverts commit c5469260cddac6b067773aea2b01dc02317501f5.

[#79503492]
Replaced nats.publish calls with naps_rpc.send_message

- removed logging tests

[#79503492]

Signed-off-by: Zachary Auerbach <zak@zaksoup.com>
Fixed NatsRpc.send_message to encode the payload as json

Signed-off-by: Zachary Auerbach <zak@zaksoup.com>
Merge final release for build 2749 to develop
Bump bosh-agent

[#71252412]

Signed-off-by: Zachary Auerbach <zak@zaksoup.com>
Bump agent with warden registry changes

Signed-off-by: Maria Shaldibina <mariash@pivotal.io>
updated CHANGELOG with build 2748, 2749
Job may end at the same time it started on machines with low clock
precision
Adding final release for build 2751