prepare 3.122.2
modify locales in POM.
update checkstyle & spotbugs plugins.
start 3.121.3-SNAPSHOT
prepare 3.121.2
start 3.120.3-SNAPSHOT
prepare 3.120.2
loose quaternion unit test condition for JDK9 or later.
reducing checkstyle warnings.
replacing DatatypeConverter(JAXB).
start 3.101.107-SNAPSHOT
prepare 3.101.106
update pmd plugin.
update checkstyle plugin.
move assembly config.
update assembly plugins.
update jar plugins.
update javadoc plugins.
findbugs to spotbugs
move checkstyle & pmd configs.