Changing installation dir from tomee/${classifier}/${properties.tomeeVersion} to tomee-${classifier}-${properties.tomeeVersion}. This way dpkg won complain when removing other versions of tomee.
Adding "-e" flag in the installation scripts.

git-svn-id: https://svn.apache.org/repos/asf/tomee/tomee/trunk@1585731 13f79535-47bb-0310-9956-ffa450edef68