Back to using snapshots for Pool and DBCP to pick up latest versions with improved JMX stats

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1550114 13f79535-47bb-0310-9956-ffa450edef68
Consistent naming

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1550115 13f79535-47bb-0310-9956-ffa450edef68