Removed build definition and use VS2017 image
Removed build definition and use VS2017 image

jeff-pang/Nancy,damianh/Nancy,xt0rted/Nancy,NancyFx/Nancy,sadiqhirani/Nancy,JoeStead/Nancy,blairconrad/Nancy,danbarua/Nancy,JoeStead/Nancy,xt0rted/Nancy,damianh/Nancy,NancyFx/Nancy,JoeStead/Nancy,blairconrad/Nancy,NancyFx/Nancy,sadiqhirani/Nancy,sadiqhirani/Nancy,danbarua/Nancy,xt0rted/Nancy,jeff-pang/Nancy,blairconrad/Nancy,danbarua/Nancy,blairconrad/Nancy,sadiqhirani/Nancy,NancyFx/Nancy,danbarua/Nancy,JoeStead/Nancy,xt0rted/Nancy,jeff-pang/Nancy,jeff-pang/Nancy,damianh/Nancy