Raise the QA Capybara's default wait time from 4 to 10

We were seeing intermittent failures on CI due to slow responses from
certain endpoints.

qa/qa/specs/config.rb

@@ -50,7 +50,7 @@ module QA
         Capybara.configure do |config|
           config.default_driver = :chrome
           config.javascript_driver = :chrome
-          config.default_max_wait_time = 4
+          config.default_max_wait_time = 10
 
           # https://github.com/mattheworiordan/capybara-screenshot/issues/164
           config.save_path = 'tmp'