Added check in PoolingDataSource constructor to make sure connection factory and pool are linked.  JIRA: DBCP-412.

git-svn-id: http://svn.apache.org/repos/asf/commons/proper/dbcp@1592119 13f79535-47bb-0310-9956-ffa450edef68
Updated change log for DBCP-414.

git-svn-id: http://svn.apache.org/repos/asf/commons/proper/dbcp@1592123 13f79535-47bb-0310-9956-ffa450edef68
Fixed connection leak when managed connections are closed during transactions. JIRA: DBCP-417.

git-svn-id: http://svn.apache.org/repos/asf/commons/proper/dbcp@1592132 13f79535-47bb-0310-9956-ffa450edef68