Make use of a `gitlab-qa-sandbox` group if available

This will use a top-level group if it's available, or create one if it's
not, then create our `qa_test_*` groups as subgroups of the sandbox
group.

qa/qa/page/dashboard/groups.rb

@@ -2,16 +2,47 @@ module QA
   module Page
     module Dashboard
       class Groups < Page::Base
+        def prepare_sandbox
+          sandbox_name = Runtime::Namespace.sandbox_name
+
+          fill_in 'Filter by name...', with: sandbox_name
+
+          if page.has_content?(sandbox_name)
+            return click_link(sandbox_name)
+          else
+            click_on 'New group'
+
+            populate_group_form(sandbox_name, "QA sandbox")
+          end
+        end
+
         def prepare_test_namespace
-          if page.has_content?(Runtime::Namespace.name)
-            return click_link(Runtime::Namespace.name)
+          namespace_name = Runtime::Namespace.name
+
+          if page.has_content?('Subgroups')
+            click_link 'Subgroups'
+
+            if page.has_content?(namespace_name)
+              return click_link(namespace_name)
+            end
+
+            # NOTE: Inconsistent capitalization here in the UI
+            click_on 'New Subgroup'
+          else
+            click_on 'New group'
           end
 
-          click_on 'New group'
+          populate_group_form(
+            namespace_name,
+            "QA test run at #{Runtime::Namespace.time}"
+          )
+        end
+
+        private
 
-          fill_in 'group_path', with: Runtime::Namespace.name
-          fill_in 'group_description',
-                  with: "QA test run at #{Runtime::Namespace.time}"
+        def populate_group_form(name, description)
+          fill_in 'group_path', with: name
+          fill_in 'group_description', with: description
           choose 'Private'
 
           click_button 'Create group'

qa/qa/runtime/namespace.rb

@@ -10,6 +10,10 @@ module QA
       def name
         'qa_test_' + time.strftime('%d_%m_%Y_%H-%M-%S')
       end
+
+      def sandbox_name
+        'gitlab-qa-sandbox'
+      end
     end
   end
 end

qa/qa/scenario/gitlab/project/create.rb

@@ -13,7 +13,10 @@ module QA
 
           def perform
             Page::Main::Menu.act { go_to_groups }
-            Page::Dashboard::Groups.act { prepare_test_namespace }
+            Page::Dashboard::Groups.act do
+              prepare_sandbox
+              prepare_test_namespace
+            end
             Page::Group::Show.act { go_to_new_project }
 
             Page::Project::New.perform do |page|