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.

gstlal-inspiral/bin/gstlal_inspiral

@@ -373,8 +373,10 @@ def parse_command_line():
 		raise ValueError("must supply exactly as many --svd-bank options as --output")
 	if options.ranking_stat_output and len(options.ranking_stat_output) != len(options.output):
 		raise ValueError("must supply either none or exactly as many --ranking-stat-output options as --output")
-	if options.likelihood_snapshot_interval and not options.ranking_stat_output:
+	if (options.likelihood_snapshot_interval and not options.ranking_stat_output) and not options.injections:
 		raise ValueError("must set --ranking-stat-output when --likelihood-snapshot-interval is set")
+	if options.ranking_stat_output and options.injections:
+		raise ValueError("must not set --ranking-stat-output when --injections is set")
 	if options.ranking_stat_output is None or len(options.ranking_stat_output) == 0:
 		options.ranking_stat_output = [None] * len(options.output)
 
@@ -403,9 +405,12 @@ def parse_command_line():
 
 	if options.data_source in ("lvshm", "framexmit"):
 		missing_options = []
-		for option in ["job_tag", "ranking_stat_input", "ranking_stat_pdf", "zerolag_rankingstat_pdf"]:
+		for option in ["job_tag", "ranking_stat_input", "ranking_stat_pdf"]:
 			if getattr(options, option) is None:
 				missing_options.append("--%s" %option.replace("_","-"))
+		if not options.injections:
+			if getattr(options, "zerolag_rankingstat_pdf") is None:
+				missing_options.append("--zerolag-rankingstat-pdf")
 
 		if missing_options:
 			raise ValueError("missing required option(s) %s when --data-source is lvshm or framexmit" % ", ".join(missing_options))
@@ -776,7 +781,7 @@ for output_file_number, (svd_bank_url_dict, output_url, ranking_stat_output_url,
 	# the new injection file to disk before the pipeline starts up
 	#
 
-	if options.injections and options.reference_psd:
+	if (options.injections and options.reference_psd) and not options.data_source in ("lvshm", "framexmit"):
 		if options.verbose:
 			print("calculating expected SNR for injections...", file=sys.stderr)