add path and path_with_namespace to api project entity

spec/models/user_team_project_relationship_spec.rb

@@ -1,3 +1,15 @@
+# == Schema Information
+#
+# Table name: user_team_project_relationships
+#
+#  id              :integer          not null, primary key
+#  project_id      :integer
+#  user_team_id    :integer
+#  greatest_access :integer
+#  created_at      :datetime         not null
+#  updated_at      :datetime         not null
+#
+
 require 'spec_helper'
 
 describe UserTeamProjectRelationship do