Replaced OpenDJ Server classes by equivalent SDK classes.

Jean-Noel Rouvignac

03.14.2014 4ee3bd2c336f6859ac5919aa749777ae1ce07783

opendj3-server-dev/src/server/org/opends/server/admin/DurationUnit.java does not exist in tree 2b8611c95c7fa66a39d2501d8b1b94d5822a33f4