Fix a couple of output/upload value issues in pycbc live (gwastro#4953)

* get singles back to being reduced chisquared in uploads

* Save ranking statistic information in the "likelihood" part of the coinc table

* Not all CandidateForGraceDB will have stat in the coinc_results

Author: GarethCabournDavies

pycbc/events/single.py

@@ -303,7 +303,8 @@ def check(self, trigs, data_reader):
 
         # fill in a new candidate event
         candidate = {
-            f'foreground/{self.ifo}/{k}': cutall_trigs[k][i] for k in trigs
+            f'foreground/{self.ifo}/{k}': cut_trigs[k][sngl_idx][i]
+            for k in trigs
         }
         candidate['foreground/stat'] = rank[i]
         candidate['foreground/ifar'] = ifar

pycbc/io/gracedb.py

@@ -136,7 +136,10 @@ def __init__(self, coinc_ifos, ifos, coinc_results, **kwargs):
         coinc_event_row.time_slide_id = lsctables.TimeSlideID(0)
         coinc_event_row.process_id = proc_id
         coinc_event_row.coinc_event_id = coinc_id
-        coinc_event_row.likelihood = 0.
+        if 'foreground/stat' in coinc_results:
+            coinc_event_row.likelihood = coinc_results['foreground/stat']
+        else:
+            coinc_event_row.likelihood = 0.
         coinc_event_table.append(coinc_event_row)
         outdoc.childNodes[0].appendChild(coinc_event_table)