Make fact delegating configurable, defaulting to 1.x behavior

lib/ansible/playbook/block.py

@@ -34,6 +34,7 @@ class Block(Base, Become, Conditional, Taggable):
     _rescue = FieldAttribute(isa='list', default=[])
     _always = FieldAttribute(isa='list', default=[])
     _delegate_to = FieldAttribute(isa='list')
+    _delegate_facts = FieldAttribute(isa='bool', defalt=False)
 
     # for future consideration? this would be functionally
     # similar to the 'else' clause for exceptions

lib/ansible/playbook/role/__init__.py

@@ -61,6 +61,7 @@ def hash_params(params):
 class Role(Base, Become, Conditional, Taggable):
 
     _delegate_to = FieldAttribute(isa='string')
+    _delegate_facts = FieldAttribute(isa='bool', defalt=False)
 
     def __init__(self, play=None):
         self._role_name        = None

lib/ansible/playbook/role/include.py

@@ -41,6 +41,7 @@ class RoleInclude(RoleDefinition):
     """
 
     _delegate_to    = FieldAttribute(isa='string')
+    _delegate_facts = FieldAttribute(isa='bool', defalt=False)
 
     def __init__(self, play=None, role_basedir=None, variable_manager=None, loader=None):
         super(RoleInclude, self).__init__(play=play, role_basedir=role_basedir, variable_manager=variable_manager, loader=loader)

lib/ansible/playbook/task.py

@@ -72,6 +72,7 @@ class Task(Base, Conditional, Taggable, Become):
     _changed_when         = FieldAttribute(isa='string')
     _delay                = FieldAttribute(isa='int', default=5)
     _delegate_to          = FieldAttribute(isa='string')
+    _delegate_facts       = FieldAttribute(isa='bool', defalt=False)
     _failed_when          = FieldAttribute(isa='string')
     _first_available_file = FieldAttribute(isa='list')
     _loop                 = FieldAttribute(isa='string', private=True)

lib/ansible/plugins/strategy/__init__.py

@@ -289,7 +289,7 @@ class StrategyBase:
 
                     # find the host we're actually refering too here, which may
                     # be a host that is not really in inventory at all
-                    if task.delegate_to is not None:
+                    if task.delegate_to is not None and task.delegate_facts:
                         task_vars = self._variable_manager.get_vars(loader=self._loader, play=iterator._play, host=host, task=task)
                         self.add_tqm_variables(task_vars, play=iterator._play)
                         if item is not None: