glTF 2.0 Model Test Failure

[hpinkos]

Both @mramato and I are seeing this test failure. Can someone please look at this before the release on Monday? @lilleyse @likangning93 @ggetz @OmarShehata

loads a glTF 2.0 model
     Scene/Model
     Expected to render [169,3,3,255], but actually rendered [170,6,6,255].
    at <Jasmine>
    at Specs/Scene/ModelSpec.js:948:27
    at Promise.then (Source/ThirdParty/when.js:196:34)
    at Source/ThirdParty/when.js:297:13
    at processQueue (Source/ThirdParty/when.js:647:4)

[pjcozzi]

@OmarShehata could you please take a first look? Potentially a trivial change to adjust the test if we deem nothing broke.

[likangning93]

Wonder if this is related to #6877

[lilleyse]

Yeah I think it's just a matter of the test being too strict, since the rendered color may vary between systems. Usually checking that the color is within some loose range is good enough.