Raju/event flush default

[raju-opti]

Summary

• The "what"; a concise description of each logical change
• Another change

The "why", or other context.

Test plan

Issues

• "THING-1234" or "Fixes Fix(nodejs/event_dispatcher): update error/resp handlers #123"

[coveralls]

coverage: 81.835%. remained the same
when pulling 557e5a3 on raju/event_flush_default
into aaf83d7 on master.