Sync Manager: update to support P2P Stubs

[pchainho]

• Don't add MN listeners for P2P stubs and request the registry to resolve the data object address to the p2p stub address
• Exchange messages between runtime sync managers to setup data sync route through the p2p connection:
  1 - use WatchingYou to monitor changes (new or remove) to data object reporters and data object observers
  2 - use WatchingYou to monitor changes to p2p connections
  3 - for new reporters, sync manager sends a subscribe message to each live p2p connection to subscribe to data object and subscription address (similar to subscribe sent to MN)
  4 - for new observer, sync manager sends a subscribe message to each live p2p connection to subscribe to data object changes address and each "children" address (similar to subscribe sent to MN)
  5 - for new p2p connection performs step 3 for each existing reporter and step 4 for each existing observer.