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 #39497
level0:lal

00:05:01

 
  Level1
passed #39498
level1:lalframe

00:02:07

passed #39499
level1:lalmetaio

00:01:54

passed #39500
level1:lalsimulation

00:05:18

passed #39501
level1:lalxml

00:01:44

 
  Level2
passed #39502
level2:lalburst

00:02:17

passed #39503
level2:lalinspiral

00:05:13

passed #39504
level2:lalpulsar

00:03:40

passed #39505
level2:lalstochastic

00:02:00

 
  Level3
passed #39506
level3:laldetchar

00:02:13

passed #39507
level3:lalinference

00:08:38

 
  Level4
passed #39508
level4:lalapps

00:06:35