Removed the ParallelTextWriter experiment (never achieved?, never a success?)

Jean-Noël Rouvignac

06.41.2015 3d755209dc2cab1dad0cf00843fbd3af009ecf62

opendj-server-legacy/src/main/java/org/opends/server/loggers/ParallelTextWriter.java does not exist in tree 179feae3078ba8842017d43a7ae59be303b29285