GreenBids module: Ignore broken tests

[Net-burst]

🔧 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?

We overlooked that unit tests for GreenBid module were using a real world URL to pull a file from the internet. The file is no more, so tests now fail which breaks the build of the project.

🧠 Rationale behind the change

This is a quick and dirty "fix" until tests are properly updated by maintainer @EvgeniiMunin .

🔎 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?

[Net-burst]

@EvgeniiMunin FYI. Please fix this in your next PR. Also, unit tests should NOT depend on anything external. Because in cases like this, they will break the build of the whole project.