LRA quickstart is not spec compliant

The quickstart interprets the return value from an LRA close call to comprise the business data returned from each participant complete call (as a json array). The spec has since been updated for the LRA close operation to not return business data (since it is considered an anti-pattern in some circles).

The quickstart should revert to an earlier version where the outcome of the "sub bookings" was obtained by querying the services directly (it should still be in the commit history).

In particular look at the code TripCheck.java in commit e2514c4bb3e2b80f0