refactor(model-server): implement ModelReplicationServer from ABC

Use the generated abstract base class for the implementation of
ModelReplicationServer.

Author: languitar

model-server-openapi/specifications/model-server-v2.yaml

@@ -277,6 +277,13 @@ paths:
           required: false
           schema:
             type: boolean
+            default: true
+        - name: legacyGlobalStorage
+          in: "query"
+          required: false
+          schema:
+            type: boolean
+            default: false
         - name: repository
           in: "path"
           required: true