Adding the Startup Application Query event class in the discovery category.

[maxhotta]

The Startup Application Query class captures the results of a discovery on target devices. This class was refactored from a previous submission, while incorporating feedback from Paul.

Description of changes:

Made the Startup Application object more clear by factoring out unrelated items in the type_id list. The list now describes only the type of application. A run_mode attribute was added as an array to capture the other items. Also added a run_state to capture the state of the application at the time the event was logged.