ACCUMULO-1082 loosen the timing requirements for testParallelWriteSpeed

git-svn-id: https://svn.apache.org/repos/asf/accumulo/branches/1.5@1448815 13f79535-47bb-0310-9956-ffa450edef68
ACCUMULO-1082 loosen the timing requirements for testParallelWriteSpeed; merge to trunk

git-svn-id: https://svn.apache.org/repos/asf/accumulo/trunk@1448817 13f79535-47bb-0310-9956-ffa450edef68