OOIION-1262: Devices return all kinds of agent definitions
OOIION-1262: Status computation works for platform data agents for device, site, facility extension
Create instrument agent and external dataset agent instance in OOI preload
Change get_recent_events limit to 2000 and disable unused event computed attributes
Enhanced resource registry client logging polish
Bumped pyon and ion-definitions to latest REL2.0
Merge pull request #1489 from mmeisinger/fix1262_i4_r2

OOIION-1262: Dataset agent status fix and others