Legacy Sortable bid adapter

[edmonl]

Type of change

• [x ] New bidder adapter

Description of change

The PR backporst Sortable bid adapter to legacy. GDPR support is removed and utils.isPlainObject(...) is replaced with utils.isA(..., 'Object').

• test parameters for validating bids

var adUnits = [
  {
    code: 'test-pb-leaderboard',
    sizes: [[728, 90]],
    bids: [{
      bidder: 'sortable',
      params: {
        tagId: 'test-pb-leaderboard',
        siteId: 1,
        'keywords': {
          'key1': 'val1',
          'key2': 'val2'
        }
      }
    }]
  }, {
    code: 'test-pb-banner',
    sizes: [[300, 250]],
    bids: [{
      bidder: 'sortable',
      params: {
        tagId: 'test-pb-banner',
        siteId: 1
      }
    }]
  }, {
    code: 'test-pb-sidebar',
    size: [[160, 600]],
    bids: [{
      bidder: 'sortable',
      params: {
        tagId: 'test-pb-sidebar',
        siteId: 1,
        'keywords': {
          'keyA': 'valA'
        }
      }
    }]
  }
];

[idettman]

LGTM. Verified test parameters from sortableBidAdapter.md, received valid results from the /openrtb2/auction endpoint.

[idettman]

fetch isn't supported by Internet Explorer 10 or 11, and prebid supports IE 10+: https://caniuse.com/#search=fetch

The prebid ajax function should work as a substitute. If you search the adapters codebase, you'll find usage examples.

[idettman]

Remove usages of the 'fetch' api (fetch is not supported by Internet Explorer 10 - 11)

[edmonl]

@idettman I removed fetch and used ajax instead. Checks failed but seem not relevant to this change?

[idettman]

LGTM, Note: the initial circle test failed with an error not related to this adapter, but I ran circleci again and it resolved :)