Change parameters to use only default_from for dynamic default values.

Replace all occurences of create_default with equivalent default_from
and remove create_default from the framework. This is needed for
proper parameter validation, as there is no way to tell which
parameters to validate prior to calling create_default, because
create_default does not provide information about which parameters are
used for generating the default value.

makeapi

@@ -45,7 +45,6 @@ PARAM_IGNORED_KW_ATTRIBUTES = ('label',
                                'normalizer',
                                'encoder',
                                'default_from',
-                               'create_default',
                                'hint',
                                'flags',
                                'sortorder',)