Fixed multisampling issues for some tests on ATI

Change-Id: I3ec6343e8a510be8bb6dd1bf204ec9c6d678d038
Add failure filter to session.auth(...) deferred

Application errors where being reported as authentication errors.
Add failure filter to then(...) to handle authentication errors
and allow the otherwise(...) statement to handle application
errors.

Change-Id: Ib61fe22838959d970925cb09ed133bf60dee7a3b
Merge topic 'vtkweb-improve-auth-errors' into master

4b03a9b9 Add failure filter to session.auth(...) deferred
Merge topic 'turn_multisampling_off_tests' into master

82fca2dc Fixed multisampling issues for some tests on ATI