[java] Enabling SM for RemoteWebDriverDownloadTest as it is not executed in RBE.

Author: diemol

java/test/org/openqa/selenium/grid/router/RemoteWebDriverDownloadTest.java

@@ -81,7 +81,7 @@ public void setupServers() {
             new TomlConfig(
                 new StringReader(
                     "[node]\n"
-                        + "selenium-manager = false\n"
+                        + "selenium-manager = true\n"
                         + "enable-managed-downloads = true\n"
                         + "driver-implementation = "
                         + browser.displayName())));