Azure CI followup
1. Move doc build, as it occasionally times out on travis. This may be tricky as I think we have an encrypted key on Travis to push the docs to http://pandas-docs.github.io/pandas-docs-travis/ (cc @jorisvandenbossche)
2. Setup https://docs.microsoft.com/en-us/azure/devops/pipelines/tasks/test/publish-test-results?view=vsts&tabs=yaml

