Check for 'alpha' in version name instead of 'dev' (Azure#20962)

This change ensures that zero version is set for set for packages which do not have a dev version

Fixed in this commit used by cosmos: Azure@6277247#diff-3de6019583e14d1c68408eb8638c57363de6606e2bcfae8b1ca074609577d70c

Author: danieljurek

eng/versioning/set_versions.py

@@ -92,7 +92,7 @@ def set_dev_zero_version(build_type, build_qualifier):
 
             if hasattr(module, 'current'):
 
-                if 'dev' in module.current:
+                if 'alpha' in module.current:
                     newlines.append(module.string_for_version_file())
                     continue