Handle optional arguments for run_forever()

All the other daemons do this, and since the out deamon wrapper
scripts pass all the command line options through directly, seems
simple enough to handle them by ignoring.

This is also applied to run_once().

Change-Id: I1df83bdf78f0dc3d911019f67f78301967b5da72
Closes-Bug: #1253891
Signed-off-by: Peter Portante <peter.portante@redhat.com>