symitriDapRtdProvider - Enable X2 Tokenize endpoint

[jpalladino84]

Type of change

• Feature

Description of change

We are making our new X2 Tokenize endpoint available for clients that so choose to use it. This change allows clients to alter the api_version in their config to use either x1 or x2. The X1 Tokenize endpoint is still available for clients that do not wish to, or need to switch.

Additionally all clients will still use our X1 Membership endpoint regardless of the api_version setting.

[jpalladino84]

ci/circleci Build failure seems unrelated to our changes. Additionally other PRs seem to be suffering from the same failure?

[21:03:22] 'test-only' errored after 30 min
[21:03:22] Error: Karma tests failed with exit code 1
    at ChildProcess.<anonymous> (/home/circleci/Prebid.js/gulpfile.js:418:12)
    at ChildProcess.emit (node:events:519:28)
    at ChildProcess.emit (node:domain:551:15)
    at ChildProcess._handle.onexit (node:internal/child_process:294:12)
    at Process.callbackTrampoline (node:internal/async_hooks:130:17)
[21:03:22] 'test' errored after 35 min

Exited with code exit status 1```

[patmmccann]

@jpalladino84 please cover these changes with unit tests

your test failures were a timeout on browserstack edge, all the other browsers passed

[jpalladino84]

@patmmccann Thanks for confirming.

Tests have been added.

[patmmccann]

You're just testing for undefined callback; it seems your pr shows changing the endpoint, you should test if changing the config successfully changes the endpoint destination