sync-swarm to be renamed to beamup-orchestrate and to take triggers

[Ivshti]

Currently, after an app is deployed on the deployer server, we call sync-swarm on the swarm manager to start running it.

Rename the swarm-syncer/beamup-sync-swarm script to orchestrate/beamup-orchestrate and make it only invokable with triggers, such as:

• app-deploy APPNAME
• app-destroy APPNAME

This "on deploy" trigger will allow us to also send ENV vars along, which is something that the current swarm-syncer does not support.

This will also require changes in the dokku plugin