MAHOUT-1378: Running Random Forest with Ignored features fails when loading feature descriptor from JSON file

git-svn-id: https://svn.apache.org/repos/asf/mahout/trunk@1551019 13f79535-47bb-0310-9956-ffa450edef68
MAHOUT-1377: Exclude JUnit.jar from tarball

git-svn-id: https://svn.apache.org/repos/asf/mahout/trunk@1551021 13f79535-47bb-0310-9956-ffa450edef68
MAHOUT-1371: Arff loader can misinterpret nominals with integer, real or string

git-svn-id: https://svn.apache.org/repos/asf/mahout/trunk@1551035 13f79535-47bb-0310-9956-ffa450edef68
MAHOUT-1371: Arff loader can misinterpret nominals with integer, real or string

git-svn-id: https://svn.apache.org/repos/asf/mahout/trunk@1551036 13f79535-47bb-0310-9956-ffa450edef68