/usr/lib/bareos/backends/libbareossd-tape.so is in bareos-storage-tape 14.2.1+20141017gitc6c5b56-3+deb8u3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/bareos/backends/libbareossd-tape-14.2.1.so