Merge branch 'develop' into issue-474

...java/org/orekit/files/ccsds/ndm/adm/AttitudeEndoints.java

.../org/orekit/files/ccsds/ndm/adm/apm/ApmQuaternionKey.java

...n/java/org/orekit/files/ccsds/ndm/odm/CommonMetadata.java

.../java/org/orekit/files/ccsds/ndm/odm/oem/OemMetadata.java

.../orekit/files/ccsds/utils/lexical/XmlLexicalAnalyzer.java

src/main/java/org/orekit/frames/EOPHistory.java

...va/org/orekit/frames/RapidDataAndPredictionXMLLoader.java

...n/java/org/orekit/models/earth/atmosphere/NRLMSISE00.java

src/main/java/org/orekit/propagation/analytical/tle/TLE.java

...tion/semianalytical/dsst/utilities/JacobiPolynomials.java

src/main/java/org/orekit/time/AbsoluteDate.java

src/main/java/org/orekit/time/FieldAbsoluteDate.java

...ava/org/orekit/files/ccsds/ndm/adm/apm/APMParserTest.java

...g/orekit/files/ccsds/ndm/odm/oem/EphemerisWriterTest.java

...ava/org/orekit/files/ccsds/ndm/odm/opm/OpmParserTest.java

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

...va/org/orekit/models/earth/atmosphere/NRLMSISE00Test.java

...g/orekit/propagation/analytical/tle/TLEConstantsTest.java

...t/java/org/orekit/propagation/analytical/tle/TLETest.java

src/test/java/org/orekit/time/AbsoluteDateTest.java