Merge branch 'qa-fix-register-spec-failure' into 'master'

QA: Resolve "Failure in qa/specs/features/browser_ui/1_manage/login/register_spec.rb"

See merge request gitlab-org/gitlab-ce!21963

qa/qa/page/main/login.rb

@@ -108,6 +108,7 @@ module QA
         end
 
         def switch_to_register_tab
+          set_initial_password_if_present
           click_element :register_tab
         end