use convergence based on normalized parameters evolution.

.../org/orekit/estimation/leastsquares/BatchLSEstimator.java

.../orekit/estimation/leastsquares/BatchLSEstimatorTest.java

...rekit/estimation/leastsquares/OrbitDeterminationTest.java

...est/java/org/orekit/estimation/measurements/BiasTest.java

...org/orekit/estimation/measurements/GroundStationTest.java

.../resources/orbit-determination/Lageos2/od_test_Lageos2.in

src/test/resources/orbit-determination/W3B/od_test_W3.in

...ls/java/fr/cs/examples/estimation/OrbitDetermination.java

src/tutorials/resources/orbit-determination.in