Setup basic Runtime with properties and platform.

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..5de2cf4f8bb7630372f5891772ff19cad6ff3055 100644
--- a/recipe_modules/properties/api.py
+++ b/recipe_modules/properties/api.py
@@ -3,7 +3,6 @@
 # that can be found in the LICENSE file.
 
 from recipe_engine import recipe_api
-from recipe_engine.types import freeze
 import collections
 
 # Use RecipeApiPlain because collections.Mapping has its own metaclass.
@@ -21,25 +20,14 @@ class PropertiesApi(recipe_api.RecipeApiPlain, collections.Mapping):
 
   properties_client = recipe_api.RequireClient('properties')
 
-  def __init__(self, **kwargs):
-    super(PropertiesApi, self).__init__(**kwargs)
-    self._frozen_properties = None
-
-  @property
-  def _properties(self):
-    if self._frozen_properties is None:
-      self._frozen_properties = freeze(
-          self.properties_client.get_properties())
-    return self._frozen_properties
-
   def __getitem__(self, key):
-    return self._properties[key]
+    return self.properties_client.properties[key]
 
   def __len__(self):
-    return len(self._properties)
+    return len(self.properties_client.properties)
 
   def __iter__(self):
-    return iter(self._properties)
+    return iter(self.properties_client.properties)
 
   def legacy(self):  # pragma: no cover
     """Returns a reduced set of properties, possibly used by legacy scripts."""
@@ -54,4 +42,4 @@ class PropertiesApi(recipe_api.RecipeApiPlain, collections.Mapping):
 
   def thaw(self):
     """Returns a vanilla python jsonish dictionary of properties."""
-    return self.properties_client.get_properties()
+    return self.properties_client.mutable_properties()