Process injections in online analysis

Finish the development required to process injections in the online analysis.

• Find the injection that corresponds to a particular trigger by sorting the sim inspiral table by gps time. Then append this injection to the coinc event file as a new sim_inspiral table with a single row.
• Fix complaints about missing options in gstlal_inspiral for injection jobs. Allow injection jobs to run without a ranking stat output option, since we don't want the injections to get included in the background estimation.
• DAG level change in gstlal_inspiral_ll_workflow: add the injection filtering layer before the non-injection filtering layer, otherwise the injection jobs have the non-injection jobs as parents and they will never start.

This branch has been tested and runs without errors.