Use plain python.exe for windows CI on Azure.

Signed-off-by: Philippe Ombredanne <[email protected]>

Author: pombredanne

etc/ci/azure-win.yml

@@ -31,7 +31,7 @@ jobs:
 
           - script: |
                python --version
-               echo | set /p=py $(python_version)> PYTHON_EXECUTABLE
+               echo | set /p=python> PYTHON_EXECUTABLE
                configure --dev
             displayName: 'Run Configure'