Give opensrf.py reasonable defaults for options

Give opensrf.py reasonable defaults for options

Rather than:
opensrf.py -l -d -f /openils/conf/opensrf_core.xml -p /openils/var/run/ -a start_all

you can now use:
opensrf.py -l -d -a start_all

Isn't that better? Note that we put the PIDs into PID_DIR/run/opensrf/
so that if/when OpenSRF is installed outside of the /openils/ prefix,
the names of the processes won't conflict with any other application PIDs.
Unlikely, but you never know.

git-svn-id: svn://svn.open-ils.org/OpenSRF/trunk@2067 9efc2488-bf62-4759-914b-345cdb29e865