ENH: Test for server issue 99.

Warning: may cause an infinite loop with output in one server thread.

tests/test_issues_server.py

@@ -154,6 +154,7 @@ def test_issue_99():
     docker_dir = os.path.join(db.get_config().get("IntegrationTests",
                                                   "test_files.test_insert_files_in_dir.server"),
                               "test_issue_99")
+    os.makedirs(local_dir)
     with tempfile.NamedTemporaryFile(dir=local_dir) as file_99:
         # Create File entity in CaosDB
         c = db.Container()