Include slavename in properties.legacy()

recipe_modules/properties/api.py

Index: recipe_modules/properties/api.py
diff --git a/recipe_modules/properties/api.py b/recipe_modules/properties/api.py
index 305b5d1698061a4cbc747e48ba6e91ae33079645..b11f41b900173b9597dc38411a9dde2a448c0ad4 100644
--- a/recipe_modules/properties/api.py
+++ b/recipe_modules/properties/api.py
@@ -42,7 +42,7 @@ class PropertiesApi(recipe_api.RecipeApiPlain, collections.Mapping):
     return iter(self._properties)
 
   def legacy(self):  # pragma: no cover
-    """Returns a reduced set of properties, possibly used by legacy scripts."""
+    """Returns a set of properties, possibly used by legacy scripts."""
 
     # Add all properties to this blacklist that are required for testing, but
     # not used by any lecacy scripts, in order to avoid vast expecation
@@ -50,7 +50,10 @@ class PropertiesApi(recipe_api.RecipeApiPlain, collections.Mapping):
     blacklist = set([
       'buildbotURL',
     ])
-    return {k: v for k, v in self.iteritems() if k not in blacklist}
+    props = {k: v for k, v in self.iteritems() if k not in blacklist}
+    if props.get('bot_id') and not props.get('slavename'):
+      props['slavename'] = props['bot_id']
+    return props
 
   def thaw(self):
     """Returns a vanilla python jsonish dictionary of properties."""