Support pulling both Eventbrite and Meetup data for the Same Organization

[allella]

As an example, Carolina Code School posts most events to Meetup, but events like their Demo Days are on Eventbrite.

https://www.eventbrite.com/o/carolina-code-school-16752445958
https://www.meetup.com/Carolina-Code-School/

The organizations API data and this repo aren't designed to do both things for a single organization.

[allella]

When I say "organizations" I'm referring to our "Organizations API", which has a human-viewable version at the links below.
This orgs data is the input for the "Events API", and how it knows where to look for an orgs events. Usually this is Meetup.com or Eventbrite, but it's rarely been both for the same organization, which is why we haven't dealt with this edge case until recently.
https://data.openupstate.org/organization/develop-carolina
https://data.openupstate.org/organization/carolina-code-school

[allella]

Example API call and the current structure

Since there are two values for each event service ("field_event_service" & "field_events_api_key") used by an organization, we'll likely need to structure these under an array of "Event Services". I'll need to figure out how to create that structure within Drupal because the API is rendered as Drupal view.

The Event's API will then need to be updated to loop through all "Event Service" array values.