If an alternate config file is pointed to in osrf_ctl.sh, respect it

If an alternate config file is pointed to in osrf_ctl.sh, respect it

In a previous edit, I accidentally removed the config file option
from the start_python command, which would break if anything other
than the configured default config file was specified as an option to
osrf_ctl.sh. This makes opensrf.py once again respect the authority
of osrf_ctl.sh.

git-svn-id: svn://svn.open-ils.org/OpenSRF/trunk@2076 9efc2488-bf62-4759-914b-345cdb29e865