Merge branch 'issue-535' into develop

src/changes/changes.xml

...n/java/org/orekit/propagation/events/EclipseDetector.java

...test/java/org/orekit/attitudes/AttitudesSequenceTest.java

...rg/orekit/propagation/analytical/EphemerisEventsTest.java

...va/org/orekit/propagation/events/EclipseDetectorTest.java

.../java/org/orekit/propagation/events/EventShifterTest.java

...a/org/orekit/propagation/events/EventSlopeFilterTest.java

.../java/org/orekit/propagation/events/EventsLoggerTest.java

...orials/java/fr/cs/examples/attitude/EarthObservation.java