Start figuring out where to add configuration

Need to add configuration code into the LEAPP framework

leapp/actors/__init__.py

@@ -470,6 +470,8 @@ def get_actor_metadata(actor):
         _get_attribute(actor, 'dialogs', _is_dialog_tuple, required=False, default_value=()),
         _get_attribute(actor, 'description', _is_type(string_types), required=False,
                        default_value=actor.__doc__ or 'There has been no description provided for this actor.'),
+        _get_attribute(actor, 'configuration', _is_type(string_types), required=False,
+                       default_value=actor.__doc__ or 'There has been no description provided for this actor.')
         _get_attribute(actor, 'apis', _is_api_tuple, required=False, default_value=())
     ])
 

leapp/models/fields/__init__.py

@@ -2,6 +2,12 @@
 import copy
 import datetime
 import json
+try:
+    # Python 3
+    from collections.abc import Sequence
+except ImportError:
+    # Python 2.7
+    from collections import Sequence
 
 import six
 
@@ -185,16 +191,17 @@ def _validate_builtin_value(self, value, name):
         self._validate(value=value, name=name, expected_type=self._builtin_type)
 
     def _validate(self, value, name, expected_type):
-        if not isinstance(expected_type, tuple):
+        if not isinstance(expected_type, Sequence):
             expected_type = (expected_type,)
+
         if value is None and self._nullable:
             return
-        if not any(isinstance(value, t) for t in expected_type):
+
+        if not isinstance(value, expected_type):
             names = ', '.join(['{}'.format(t.__name__) for t in expected_type])
             raise ModelViolationError("Fields {} is of type: {} expected: {}".format(name, type(value).__name__,
                                                                                      names))
 
-
 class Boolean(BuiltinField):
     """
     Boolean field

leapp/repository/actor_definition.py

@@ -278,6 +278,13 @@ def description(self):
         """
         return self.discover()['description']
 
+    @property
+    def configuration(self):
+        """
+        :return: Actor configurations
+        """
+        return self.discover()['configuration']
+
     @contextlib.contextmanager
     def injected_context(self):
         """