Agent should synchronize existing resources with principal upon connect

[jannfis]

The agent should synchronize all resources (apps, appprojects, etc) with the principal on the time it connects to ensure information on the principal is up-to-date as soon as possible.

Right now, the trigger is informer events on either side. While information will be eventually synchronized, it can take appResync time to do so.

When the agent connects in managed mode, it should request updates for all applications from the principal and submit back status information.

When the agent connects in autonomous mode, it should send updates for all applications to the principal.

[jgwest]

Jayendra is taking a look at this one.