[rb] use Selenium Manager to get the grid

Author: titusfortner

examples/ruby/spec/drivers/remote_webdriver_spec.rb

@@ -7,7 +7,9 @@
   let(:target_directory) { File.join(Dir.tmpdir, SecureRandom.uuid) }
   let(:wait) { Selenium::WebDriver::Wait.new(timeout: 2) }
   let(:server) do
-    Selenium::Server.get(:latest,
+    Selenium::WebDriver.logger.level = :debug
+    jar = Selenium::WebDriver::SeleniumManager.binary_paths('--grid')['driver_path']
+    Selenium::Server.new(jar,
                          background: true,
                          args: %w[--selenium-manager true --enable-managed-downloads true])
   end