[rb] do not start a new grid if one has been specified

Author: titusfortner

rb/spec/integration/selenium/webdriver/spec_helper.rb

@@ -38,7 +38,7 @@
 
   c.before(:suite) do
     $DEBUG ||= ENV['DEBUG'] == 'true'
-    GlobalTestEnv.remote_server.start if GlobalTestEnv.driver == :remote
+    GlobalTestEnv.remote_server.start if GlobalTestEnv.driver == :remote && ENV['WD_REMOTE_URL'].nil?
     GlobalTestEnv.print_env
   end