Use robust estimators for location and eccentricity of ellipses

This produces better results on a wide variety of injections.
12 jobs for ellipse-definitions in 30 minutes and 48 seconds (queued for 3 seconds)
latest
Status Job ID Name Coverage
  Level0
passed level0:lal #39497

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  Level1
passed level1:lalframe #39498

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passed level1:lalmetaio #39499

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passed level1:lalsimulation #39500

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passed level1:lalxml #39501

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  Level2
passed level2:lalburst #39502

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passed level2:lalinspiral #39503

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passed level2:lalpulsar #39504

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passed level2:lalstochastic #39505

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  Level3
passed level3:laldetchar #39506

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passed level3:lalinference #39507

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  Level4
passed level4:lalapps #39508

00:06:35