New adapter "Cointraffic" added

[stsepelin]

Type of change

• Bugfix
• Feature
• New bidder adapter
• Code style update (formatting, local variables)
• Refactoring (no functional changes, no api changes)
• Build related changes
• CI related changes
• Does this change affect user-facing APIs or examples documented on http://prebid.org?
• Other

Description of change

• test parameters for validating bids

var adUnits = [{
    code: 'test-ad-div',
    sizes: [[300, 250]],
    bids: [{
    bidder: 'cointraffic',
      params: { 
        placementId: 'testPlacementId'
      }
    }]
  }];

• official adapter submission

• Contact email of the adapter’s maintainer tech@cointraffic.io

• A link to a PR on the docs repo at New adapter "Cointraffic" added prebid.github.io#2301

Other information

[stsepelin]

The failing tests are from the Finteza analytic adapter.