Migtate buildextension to yaml (#541)
Migtate buildextension to yaml (#541)

* Move the build to YAML


rfennell/vNextBuild,ChrisLGardner/vNextBuild,ChrisLGardner/vNextBuild,rfennell/vNextBuild,ChrisLGardner/vNextBuild,rfennell/vNextBuild,rfennell/vNextBuild,ChrisLGardner/vNextBuild