Support Publish to and execution in TFS 2015 update 2

[jessehouwing]

I've recently implemented support for TFS 2015 update 2 in my own tasks. The same approach unfortunately causes a breaking change in this version, since the Basic auth scheme is already used (instead of the Token scheme which probably should have been used).

Auth-scheme definition:
https://github.com/jessehouwing/vsts-extension-tasks/blob/Feature/OnPremSupport/vss-extension.json#L176

Code to pass the right parameters to TFX:
https://github.com/jessehouwing/vsts-extension-tasks/blob/Feature/OnPremSupport/vsts-extension-shared/vsts-extension-shared.psm1#L401

I suppose that a breaking change to the Auth scheme is unwanted... Which is why I haven't tried porting my implementation over yet.

How to proceed?

[jessehouwing]

This would actually be the "right" way to solve this, but it would require people to recreate their Service Endpoint:

https://github.com/jessehouwing/vsts-extension-build-release-tasks/tree/features/onprem