Moves away from Committee and towards stripe-mock, an external
self-contained executable API stub server based on OpenAPI [1]. The
motivation here is that instead of making stripe-ruby a special
snowflake, we can use a single well-tested and feature-rich mock
implementation to drive every API's test suite.
[1] https://github.com/stripe/stripe-mock
See [1] for details, but a few conventions changed around the structure
of the OpenAPI repository and the data within the fixtures file. Here we
put in some minor changes to compensate for them.
[1] https://github.com/stripe/openapi/pull/3
Naming a directory `spec` in a Ruby project is terribly ambiguous. This
clarifies the purpose of this directory and makes it easier to find if
you know that you're looking for OpenAPI.
I'd originally added this class for the first stub pass that used
OpenAPI because I thought we'd need the ability to finetune some of our
stubbed responses. It turns out that we've been able to get away without
it so far so I'm removing it for now. This commit can be reverted if it
turns out that we need it back later.
Adds some testing infrastructure that reads in the OpenAPI spec and its
fixtures. These changes will allow us to starting porting over each of
stripe-ruby's test suites.
