Fix USD OutputProcessor errors on USD export in Houdini 20.5+#79

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BigRoy merged 1 commit intoynput:developfrom BigRoy:enhancement/houdini_20.5_outputprocessor

Aug 28, 2024

+15-5

Commits on Aug 27, 2024

Fix beginSave arguments for Houdini 20.5.182+ with added stage_variables argument to OutputProcessor.beginSave method
BigRoy
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