OPENNLP-735 Updated parent pom to version 14

git-svn-id: https://svn.apache.org/repos/asf/opennlp/trunk@1640819 13f79535-47bb-0310-9956-ffa450edef68
OPENNLP-734 Added AL 2.0 header

git-svn-id: https://svn.apache.org/repos/asf/opennlp/trunk@1640820 13f79535-47bb-0310-9956-ffa450edef68
OPENNLP-734 Added RAT exclud for snowball stemmer source code

git-svn-id: https://svn.apache.org/repos/asf/opennlp/trunk@1640822 13f79535-47bb-0310-9956-ffa450edef68