Updated Hipparchus version to 2.0-SNAPSHOT.

build.xml

pom.xml

src/test/java/org/orekit/forces/drag/DragForceTest.java

...rekit/forces/empirical/HarmonicAccelerationModelTest.java

...kit/forces/empirical/PolynomialAccelerationModelTest.java

...ava/org/orekit/forces/gravity/DeSitterRelativityTest.java

...forces/gravity/HolmesFeatherstoneAttractionModelTest.java

...rg/orekit/forces/gravity/LenseThirringRelativityTest.java

src/test/java/org/orekit/forces/gravity/RelativityTest.java

...ekit/forces/gravity/SingleBodyAbsoluteAttractionTest.java

...ekit/forces/gravity/SingleBodyRelativeAttractionTest.java

...va/org/orekit/forces/gravity/ThirdBodyAttractionTest.java

...st/java/org/orekit/forces/inertia/InertialForcesTest.java

...g/orekit/forces/maneuvers/ConstantThrustManeuverTest.java

...g/orekit/forces/radiation/SolarRadiationPressureTest.java

...t/propagation/events/FieldCloseEventsNumericalABTest.java

...t/propagation/events/FieldCloseEventsNumericalAMTest.java

.../org/orekit/propagation/events/FieldDateDetectorTest.java

...g/orekit/propagation/events/FieldEclipseDetectorTest.java

.../org/orekit/propagation/events/FieldEventsLoggerTest.java