Monkeypatch satellite call for merge request in tests

spec/support/stubbed_repository.rb

@@ -1,5 +1,6 @@
 require "repository"
 require "project"
+require "merge_request"
 require "shell"
 
 # Stubs out all Git repository access done by models so that specs can run
@@ -32,6 +33,12 @@ class Project
   end
 end
 
+class MergeRequest
+  def can_be_merged
+    true
+  end
+end
+
 class GitLabTestRepo < Repository
   def repo
     @repo ||= Grit::Repo.new(Rails.root.join('tmp', 'repositories', 'gitlabhq'))