recipe_engine: change resource API to use repo root

recipe_engine/config_types.py

Index: recipe_engine/config_types.py
diff --git a/recipe_engine/config_types.py b/recipe_engine/config_types.py
index 1e7eee64ff78d69e0f40819d5106d3529698d6b1..7c6f2296d55f2d58a907d231df8a3a86c1fc08b0 100644
--- a/recipe_engine/config_types.py
+++ b/recipe_engine/config_types.py
@@ -95,9 +95,10 @@ class ModuleBasePath(BasePath, namedtuple('ModuleBasePath', 'module')):
     return 'RECIPE_MODULE[%s]' % re.sub('\.', '::', name)
 
 
-class PackageBasePath(BasePath, namedtuple('PackageBasePath', 'package')):
+class PackageRepoBasePath(
+    BasePath, namedtuple('PackageRepoBasePath', 'package')):
   def __repr__(self):
-    return 'RECIPE_PACKAGE[%s]' % self.package.name
+    return 'RECIPE_PACKAGE_REPO[%s]' % self.package.name
 
 
 class Path(RecipeConfigType):