tests: coverage round 5 (render processor/manager, time nodes, color nodes, OFX host)
- render_processor_test: RenderProcessor audio-ticket pipeline without
GL, RenderManager params, RenderJobTracker range algebra,
SubtitleParams ASS/XML, ManagedColor, Texture dummy/job paths
- node_time_test: GapBlock, TimeOffsetNode, TimeRemapNode,
TimeFormatNode time math and retranslation
- node_color_test: OCIOBaseNode passthrough, DisplayTransformNode,
ThreeWayColorNode shader/job, OCIOGradingTransformLinearNode clamps
- plugin_node_test: OliveHost plugin scanning/descriptors/suites/error
paths