model: tensorflow: Renamed init arg in DNNClassifierModelContext

* Renamed DNNClassifierModelContext first init arg from config
  to features

Fixes: #216

Author: DimaPoliuha

CHANGELOG.md

@@ -83,6 +83,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - JSON source now has `entry_point` decoration
 - Strict flag in df.memory is now on by default
 - Dynamically created scikit models get config args correctly
+- Renamed `DNNClassifierModelContext` first init arg from `config` to `features`
 ### Removed
 - Repo objects are no longer classification specific. Their `classify`,
   `classified`, and `classification` methods were removed.

model/tensorflow/dffml_model_tensorflow/dnnc.py

@@ -107,8 +107,8 @@ class DNNClassifierModelContext(TensorflowModelContext):
     columns for real valued, string, and list of real valued features.
     """
 
-    def __init__(self, config, parent) -> None:
-        super().__init__(config, parent)
+    def __init__(self, features, parent) -> None:
+        super().__init__(features, parent)
         self.cids = self._mkcids(self.parent.config.classifications)
         self.classifications = self._classifications(self.cids)
         self.model_dir_path = self._model_dir_path()