UPS API expects most incoming variables as strings, so we need to convert the request data to string type.

"preserve_token" returns the preserved access_token or triggered when a new access token is feched via Shipment::UPS::API.
  - This variable preserves the access token, attempting to reuse it until 10 minutes before it expires.
  As the UPS API now relies on access_token, and the current token lasts for 4 hours or 14400 seconds, and is rate-limited, this has necessitated a means to save and reuse the access_token.
  - "preserve_token" accepts a CodeRef, you have the option of using the default or replacing it with your own implementation.

To maintain backward compatibility, we preserve the "proxy_domain" variable.
  Setting a proxy_domain triggers an update to the environment variable, which, in turn, updates the Shipment::UPS::API object endpoints.

- https://developer.ups.com/api/reference#tag/Tracking_other
Track data mostly stay the same but the ship_date(), I wasnt able to find a good match data for PickupDate in the json response

- https://developer.ups.com/api/reference#operation/AddressValidation
UPS deprecated Address Validation v1, so default to v2, will need to enable Rating API to fully test

- replace username, password with client_id and client_secret
- make sure environment to run tests on is 'cie' development endpoints

…, but imported via Shipment::Activity

- remove extra Request failed string
- the extra "\n" is to remove the extra error auto added at the end if there is no next line.

…ng ids

- change ["tracking_01","tracking_02"] to [tracking_01,tracking_02]