* Fixes#8532 - Review System.nanoTime() usages.
Introduced o.e.j.util.NanoTime class to deal with nanoTimes.
Now NanoTime.now() should be used instead of System.nanoTime(),
and various <unit>[elapsed|since|until]() methods to calculate nanoTimes.
Furthermore, comparing 2 nanoTimes should be done via isBefore(),
rather than using the < operator, which is wrong as specified in
the System.nanoTime() javadocs.
Signed-off-by: Simone Bordet <simone.bordet@gmail.com>
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