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* Redefine IsReady and WarmUpPeriod
* Update warm up periods of other indicators to account for ROC warmup change
* Update regressions affected by this change (because of HistoricalReturnsAlphaModel using ROC)
* Add simple unit test for issue #5491
* Cleanup warmup period math and add comments
Co-authored-by: Colton Sellers <Colton.R.Sellers@gmail.com>
David Acker