Optimized AdUp Technology bid adapter: add support for native, adomain, and multibid

[SteffenAnders]

Type of change

• Feature
• Code style update (formatting, local variables)
• Refactoring (no functional changes, no api changes)
• Other

Description of change

• Add Support for native mediaType
• Add Support for meta.advertiserDomains (Adapter does not seem capable of supporting advertiserDomains #6650)
• Add "multibidding" Support (adapter is now sending/receiving one request with all bids per auction)
• Code cleanup & refactoring
• Added/fixed tests

Example banner implementation

var adUnits = [
   {
        code: "example1",
        mediaTypes: {
            banner: {
                sizes: [[300, 250], [300, 600]],
            }
        },
        bids: [{
            bidder: "aduptech",
            params: {
                publisher: "prebid",
                placement: "12345"
            }
        }]
   }
];

Example native implementation

var adUnits = [
   {
        code: "example2",
        mediaTypes: {
            native: {
                image: {
                    required: true,
                    sizes: [150, 150]
                },
                title: {
                    required: true
                },
                body: {
                    required: true
                },
                clickUrl: {
                    required: true
                },
                displayUrl: {
                    required: true
                },
                sponsoredBy: {
                    required: true
                }
            }
        },
        bids: [{
            bidder: "aduptech",
            params: {
                publisher: "prebid",
                placement: "12345"
            }
        }]
   }
];

• official adapter submission
• Related prebid.github.io PR: Update docs for AdUp Technology bid adapter prebid.github.io#2978

[SteffenAnders]

It seems that randomly some tests for "Prebid Manager Analytics Adapter" in IE 11 are failing.
This should not have anything to do with my code changes. :(

[Rothalack]

This looks good, worked first try in testing nice and easy.

I think Chris is working on a fix for the build testing. I'm going to keep an eye on that and make sure we're stable again before I merge this.