[rb] Server code expects the jar location to be a String not a Pathname

Author: titusfortner

rb/spec/integration/selenium/webdriver/spec_support/test_environment.rb

@@ -113,7 +113,7 @@ def remote_server_jar
                 end
 
           WebDriver.logger.info "Server Location: #{jar}"
-          jar
+          jar.to_s
         end
 
         def quit