TestActor3D needed to pass its info down to deleates it
uses to do the rendering. Added that code. This fixes a failing
depth peeling test.

Reverted multisample change for OpenGL2 as it was causing all
offscreen tests to fail (many MPI tests use os rendering).

Change-Id: Ida4d2ff36a60c7e1e6f4a434208d19933791a3e5