* test/drb: Wrap tests definitions by DRbTests module.  This makes
  several tests (ACLEntryTest, TestBug4409, etc.) easier to understand
  that they are tests for DRb.



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@46293 b2dd03c8-39d4-4d8f-98ff-823fe69b080e