Use full QA sandbox group path when creating a project

qa/qa/page/project/new.rb

@@ -13,7 +13,7 @@ module QA
         def choose_test_namespace
           click_element :project_namespace_select
 
-          first('li', text: Runtime::Namespace.name).click
+          first('li', text: Runtime::Namespace.path).click
         end
 
         def choose_name(name)

qa/qa/runtime/namespace.rb

@@ -11,6 +11,10 @@ module QA
         'qa-test-' + time.strftime('%d-%m-%Y-%H-%M-%S')
       end
 
+      def path
+        "#{sandbox_name}/#{name}"
+      end
+
       def sandbox_name
         'gitlab-qa-sandbox'
       end