Camera Mgmt Example - Add documentation on how to ingest EVAM results into EdgeX

[Lenny Goodell]

🚀 Feature Request

Relevant Package [REQUIRED]

This feature request is for Camera Management app service example

Description [REQUIRED]

EVAM results are published to MQTT but not ingested into EdgeX.

Describe the solution you'd like

Update the README on how to include and configure Device MQTT to receive the results from EVAM so they are ingested into EdgeX. Also include example REST query to pull Events/Reading generated for the EVAM data from Core Data.

Describe alternatives you've considered