Make sure that the consistent program name is always set,so that
the same config sub-directory ( /etc/{project}/{prog}.conf.d ) is used
after migration to WSGI server + entry point.
Closes-Bug: #2098514
Change-Id: I71361ebbc5c76bd92e0b181704f22cf2f4df5241
Signed-off-by: Takashi Kajinami <kajinamit@oss.nttdata.com>