AdKernel: added waardex_ak alias

[romanantropov]

Added a new alias

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

{
  bidder: '<bidder name>',
  params: {
    // ...
  }
}

Be sure to test the integration with your adserver using the Hello World sample page.

• contact email of the adapter’s maintainer
• official adapter submission

For any changes that affect user-facing APIs or example code documented on http://prebid.org, please provide:

• A link to a PR on the docs repo at https://github.com/prebid/prebid.github.io/

Other information

[bretg]

Docs PR prebid/prebid.github.io#1542

[bretg]

@romanantropov -- need to fix the unit test that checks for the number of aliases. Unit tests are failing with

Adkernel adapter
    adapter configuration
      ✗ should have aliases
	expected [ Array(5) ] to have a length of 4 but got 5
	AssertionError@webpack:///node_modules/assertion-error/index.js:74 <- test/test_index.js:41331:22
	assert@webpack:///node_modules/chai/lib/chai/assertion.js:141 <- test/test_index.js:50578:31
	assertLength@webpack:///node_modules/chai/lib/chai/core/assertions.js:2126 <- test/test_index.js:52734:16
	chainableMethodWrapper@webpack:///node_modules/chai/lib/chai/utils/addChainableMethod.js:113 <- test/test_index.js:50034:54
	[native code]
	webpack:///test/spec/modules/adkernelBidAdapter_spec.js:382:44 <- test/test_index.js:68665:158

      ✗ should have aliases
	AssertionError: expected [ Array(5) ] to have a length of 4 but got 5
	    at Context.<anonymous> (webpack:///test/spec/modules/adkernelBidAdapter_spec.js:382:35 <- test/test_index.js:68665:150)

[bretg]

need to fix the unit tests

[romanantropov]

Fixed the unit test https://github.com/prebid/Prebid.js/pull/4373/commits