Enable Autobahn Test Suite on PR Validation

[mikaelm12]

Currently our PR validation is skipping the Autobahn tests because it's missing the installation step. This is the set up script that was being used before..

We need to be able to install Python, then use pip to install the autobahntestsuite pacakge to be able to run the tests.

[Tratcher]

• And they never worked after being merged into the AspNetCore repo. Need to get them working again....