Updated CCSDS ODM parsing according to changes in latest draft.

...main/java/org/orekit/files/ccsds/ndm/odm/ocm/OcmData.java

...rekit/files/ccsds/ndm/odm/ocm/OcmDataSubStructureKey.java

...main/java/org/orekit/files/ccsds/ndm/odm/ocm/OcmFile.java

...in/java/org/orekit/files/ccsds/ndm/odm/ocm/OcmParser.java

...orekit/files/ccsds/ndm/odm/ocm/OcmSatelliteEphemeris.java

...in/java/org/orekit/files/ccsds/ndm/odm/ocm/OcmWriter.java

...a/org/orekit/files/ccsds/ndm/odm/ocm/TrajectoryState.java

...rekit/files/ccsds/ndm/odm/ocm/TrajectoryStateHistory.java

...les/ccsds/ndm/odm/ocm/TrajectoryStateHistoryMetadata.java

.../ccsds/ndm/odm/ocm/TrajectoryStateHistoryMetadataKey.java

...files/ccsds/ndm/odm/ocm/TrajectoryStateHistoryWriter.java

src/test/java/org/orekit/files/ccsds/ndm/NdmTestUtils.java

...ava/org/orekit/files/ccsds/ndm/odm/ocm/OcmParserTest.java

src/test/resources/ccsds/ndm/NDM-ocm-apm.xml

...ources/ccsds/odm/ocm/OCM-incompatible-units-dimension.txt

.../resources/ccsds/odm/ocm/OCM-incompatible-units-scale.txt

...test/resources/ccsds/odm/ocm/OCM-missing-revnum-basis.txt

src/test/resources/ccsds/odm/ocm/OCM-unknown-frame.txt

src/test/resources/ccsds/odm/ocm/OCM-wrong-nb-elements.txt

src/test/resources/ccsds/odm/ocm/OCM-wrong-time-span.txt