ACCUMULO-1215 hide the parallelWriteSpeed method from old-style junit TestCase

git-svn-id: https://svn.apache.org/repos/asf/accumulo/trunk@1461749 13f79535-47bb-0310-9956-ffa450edef68
ACCUMULO-1215 wait for both tservers to come up

git-svn-id: https://svn.apache.org/repos/asf/accumulo/trunk@1461782 13f79535-47bb-0310-9956-ffa450edef68