Fix resource init/teardown in FramebufferMultiviewTest
Fix resource init/teardown in FramebufferMultiviewTest

GL RAII classes can't be used as test class members since the GL
objects need to be deleted before the test class TearDown is called.

BUG=angleproject:2765
TEST=angle_end2end_tests

Change-Id: If19d33bd044c9e74e46f35183e8ca1bc6a96d6cf
Reviewed-on: https://chromium-review.googlesource.com/1179159
Reviewed-by: Jamie Madill <7e492b4f1c8458024932de3ba475cbf015424c30@chromium.org>
Commit-Queue: Olli Etuaho <38ae6c0e2772a20e8e989f80cb8c99d274e44242@nvidia.com>

ppy/angle,ppy/angle,ppy/angle,ppy/angle