Merge pull request #5308 from zecrazytux/fix/hash_merge_dynamic_inventory

Let merge hash_bahaviour work with dynamic inventory

lib/ansible/inventory/__init__.py

@@ -348,7 +348,7 @@ class Inventory(object):
 
         vars.update(host.get_variables())
         if self.parser is not None:
-            vars.update(self.parser.get_host_variables(host))
+            vars = utils.combine_vars(vars, self.parser.get_host_variables(host))
         return vars
 
     def add_group(self, group):