Updated JUnit version to 4.13.1.

build.xml

pom.xml

...test/java/org/orekit/data/ExceptionalDataContextTest.java

src/test/java/org/orekit/data/ZipJarCrawlerTest.java

src/test/java/org/orekit/errors/OrekitExceptionTest.java

src/test/java/org/orekit/files/ccsds/OEMParserTest.java

src/test/java/org/orekit/files/ccsds/OPMParserTest.java

...t/java/org/orekit/files/ccsds/StreamingOemWriterTest.java

src/test/java/org/orekit/files/ccsds/TDMParserTest.java

.../orekit/files/general/EphemerisSegmentPropagatorTest.java

...ava/org/orekit/forces/BoxAndSolarArraySpacecraftTest.java

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

src/test/java/org/orekit/frames/EclipticProviderTest.java

src/test/java/org/orekit/frames/ITRFVersionLoaderTest.java

...rg/orekit/frames/RapidDataAndPredictionXMLLoaderTest.java

src/test/java/org/orekit/orbits/CircularOrbitTest.java

src/test/java/org/orekit/orbits/EquinoctialOrbitTest.java

src/test/java/org/orekit/orbits/FieldCartesianOrbitTest.java

src/test/java/org/orekit/orbits/FieldCircularOrbitTest.java

...est/java/org/orekit/orbits/FieldEquinoctialOrbitTest.java