install script fails if an OpenNMS directory contains root-owned lost+found directory

When running install -dis, the process will fail if one of the OpenNMS directories is at the root of an extfs filesystem, because the lost+found directory is owned and accessible only by root.

Steps to reproduce:

1. Install OpenNMS such that one of its directories (e.g., /opt/opennms/logs or /var/log/opennms) is at the root of an extfs filesystem.
2. Run ${OPENNMS_HOME}/bin/install -dis

Expected result:

The install script should complete normally.

Actual result:

The install script exits with a large stack trace, eventually blaming java.nio.file.AccessDeniedException: /opt/opennms/logs/lost+found