Fix scoping issues with Spinach tests (e.g....

Fix scoping issues with Spinach tests (e.g. https://gitlab.com/gitlab-org/gitlab-ce/builds/14929499)

features/steps/project/source/markdown_render.rb

@@ -7,7 +7,7 @@ class Spinach::Features::ProjectSourceMarkdownRender < Spinach::FeatureSteps
   include SharedMarkdown
 
   step 'I own project "Delta"' do
-    @project = Project.find_by(name: "Delta")
+    @project = ::Project.find_by(name: "Delta")
     @project ||= create(:project, :repository, name: "Delta", namespace: @user.namespace)
     @project.team << [@user, :master]
   end