sdbus++: find templates in datadir
sdbus++: find templates in datadir

Change-Id: Ib6ffd1ad51774825fe7227fc8ce48447bfd5b1f8
Signed-off-by: Brad Bishop <713d098c0be4c8fd2bf36a94cd08699466677ecd@fuzziesquirrel.com>

openbmc/sdbusplus,openbmc/sdbusplus,openbmc/sdbusplus,openbmc/sdbusplus