Make sure that the consistent program name is always set,so that
the same config sub-directory ( /etc/{project}/{prog}.conf.d ) is used
regardless of the way api service is run.
Closes-Bug: #2098514
Change-Id: Ib5c6d431176b83eefafddc1b35589015db6dfd04
Signed-off-by: Takashi Kajinami <kajinamit@oss.nttdata.com>