ignore idea files

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1470764 13f79535-47bb-0310-9956-ffa450edef68
fix maven build for jdbc-pool

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1470765 13f79535-47bb-0310-9956-ffa450edef68