Test: Transition PAAPI parameters

[marki1an]

🔧 Type of changes

• new bid adapter
• bid adapter update
• new feature
• new analytics adapter
• new module
• module update
• bugfix
• documentation
• configuration
• dependency update
• tech debt (test coverage, refactorings, etc.)

✨ What's the context?

What's the context for the changes?

🧠 Rationale behind the change

Why did you choose to make these changes? Were there any trade-offs you had to consider?

🔎 New Bid Adapter Checklist

• verify email contact works
• NO fully dynamic hostnames
• geographic host parameters are NOT required
• direct use of HTTP is prohibited - implement an existing Bidder interface that will do all the job
• if the ORTB is just forwarded to the endpoint, use the generic adapter - define the new adapter as the alias of the generic adapter
• cover an adapter configuration with an integration test

🧪 Test plan

How do you know the changes are safe to ship to production?

🏎 Quality check

• Are your changes following our code style guidelines?
• Are there any breaking changes in your code?
• Does your test coverage exceed 90%?
• Are there any erroneous console logs, debuggers or leftover code in your changes?

[marki1an]

Corresponding issue prebid/prebid-server#3536

[osulzhenko]

Required update

[osulzhenko]

we additionaly should verify:

• that aliases can request both original and iab formats.
• that if impId from configs and impId from the response are mismatched (including wildcards), nothing happens.
• that warnings are issued in debug mode, alert.general metrics are emitted.
• that interestGroupAuctionBuyer is ignored when provided by a bidder.
• that the server defaults to the original format if ext.prebid.paaformat is not set or is invalid.
• ensure that empty igs or igi arrays do not cause crashes or errors.

[osulzhenko]

we should also cover:
If there's no impid, then drop any igb objects from this entry. If any were dropped, mmit a warning in debug mode, log at N% sampling, and emit an alert.general metric.
and

Loop through the igb array
Add ext.bidder and ext.adapter to the igb entry
Add the igb entry to the global response entry

Rest is looking fine