(For David) adding support for bookings complex field in $create_order and $update_order events

[rsomavarapu-sift]

Purpose:
Capture travel and ticketing specific data by providing additional fields in the API. Here is the spec.

Technical overview:

• Add support for the new booking fields in $create_order and $update_order events

Testing Plan:

• Updated unit tests
• Send sample events using SiftClient to experiment environment and verify the changes using the experiment console.

Deployment:
will publish to Maven
Github release
(after the code changes for $bookings object are deployed)

[rsomavarapu-sift]

Request Body: https://gist.github.com/rsomavarapu-sift/0f359537995ba2885ea715e0552a2c94
Response Body: https://gist.github.com/rsomavarapu-sift/dba005d2ab79a41ca10b75d80229e2ea

[rsomavarapu-sift]

experiment console outputs for $create_order and $update_order events with updated field naming for $departure_location and $arrival_location (updated to $departure_address and $arrival_address)

$create_order
Request Body: https://gist.github.com/rsomavarapu-sift/09f60e19c758e6b017e4bb8d01ec9cff
Response Body: https://gist.github.com/rsomavarapu-sift/d505b110e62ba8b886c53146be06863f

$update_order
Request Body: https://gist.github.com/rsomavarapu-sift/4d7dc46eb392e9ef833e262f5dff2f68
Response Body: https://gist.github.com/rsomavarapu-sift/0e35e795f2b5c7e7be313cc36eeddb81