Updated stereo test so that we can get consistent image on various platforms

Change-Id: I73da0ce890e19ae3f9976aab855b21f378ad7e1b
Removed wireframe background

Change-Id: I4e3242b4af9f84f36862bcb6130883beef3fc010
Fixed camera deep copy, partial copy, and window to image filer copy

Change-Id: Ie6e80d19a444585a88ac8d6d5737ee4458fba3f2
Removed debug code

Change-Id: Id81e2fde2ae48d05a74a36f9ca59f21512b6f92c
Updated offaxis stereo test

Now drawing sphere behind the projected plane and cone in front

Change-Id: I374a6c618b88b34fd80a66cadcd3da4311081c9b
Merge topic 'fix_split_stereo_test' into master

29fc8066 Updated offaxis stereo test
94a03fda Removed debug code
d34e1f51 Fixed camera deep copy, partial copy, and window to image filer copy
f6a90eb4 Removed wireframe background
afb056ff Updated stereo test so that we can get consistent image on various platforms