Appnexus Bid Adapter: added stailamedia as an alias

[Pubstream]

Type of change

• New bidder adapter

Description of change

Adding stailamedia as bidder adapter alias for appnexus

• Tested in appnexus bidder
• Test parameters for validating bids

{
  bidder: "stailamedia",
  params: {
    "placementId": "33037108"
  }
}

• contact email of the adapter’s maintainer [email protected]
• official adapter submission

Other information

• DOCS PR: New adapter: stailamedia prebid.github.io#5448