Camera was caching when shared between multiple renderers

Fix so that when a single camer ais shared between multiple renders
the cache resets when switching renderers. Fixes cubeAxes2 test.

Change-Id: I92044938d79cf548038ffe40dde5f6ae3ced69af
Merge topic 'fix_camera_issue' into master

85d6b73a Camera was caching when shared between multiple renderers