servodriver: Fix reference to server configuration.
diff --git a/tools/wptrunner/wptrunner/browsers/servodriver.py b/tools/wptrunner/wptrunner/browsers/servodriver.py
index f6777aa..aa17eba 100644
--- a/tools/wptrunner/wptrunner/browsers/servodriver.py
+++ b/tools/wptrunner/wptrunner/browsers/servodriver.py
@@ -38,7 +38,7 @@
         "binary": kwargs["binary"],
         "binary_args": kwargs["binary_args"],
         "debug_info": kwargs["debug_info"],
-        "server_config": config.ssl_config["ca_cert_path"],
+        "server_config": config.ssl_config,
         "user_stylesheets": kwargs.get("user_stylesheets"),
     }