Fix Debian init script's "stop" action

Resolve /usr/bin/java to an actual file as:
1. it's probably a symlink
2. start-stop-daemon compares the "--exec" argument to /proc/pid/exe
3. the kernel links /proc/pid/exe to the actual file, not the symlink

So "start-stop-daemon --stop --exec /usr/bin/java" will never stop
Repose or any process if /usr/bin/java is a symlink.

See start-stop-daemon man page for more information.
Cleanup Debian init script

Remove "-- ..." because "--stop" doesn't accept arguments for the
process it's trying to stop (only "--start" does that).

See start-stop-daemon man page for more information.