Make sure FCs and RI are flushed to the database before title rebuild

In some configurations the title rebuild would find no RIs. This should
not be possible.  Flush the newst RIs and FCs before title rebuild.

Author: cmatthew

lnt/server/db/fieldchange.py

@@ -172,6 +172,7 @@ def regenerate_fieldchanges_for_run(session, ts, run_id):
                                    test=test,
                                    field_id=field.id)
                 session.add(f)
+                session.flush()
                 try:
                     found, new_reg = identify_related_changes(session, ts,
                                                               f, active_indicators)
@@ -258,6 +259,7 @@ def identify_related_changes(session, ts, fc, active_indicators):
                                        confidence))
                 ri = ts.RegressionIndicator(regression, fc)
                 session.add(ri)
+                session.flush()
                 active_indicators.append(ri)
                 # Update the default title if needed.
                 rebuild_title(session, ts, regression)

lnt/server/db/regression.py

@@ -55,8 +55,9 @@ def new_regression(session, ts, field_changes):
         ri1 = ts.RegressionIndicator(regression, fc)
         new_ris.append(ri1)
     session.add_all(new_ris)
+    session.flush()
     rebuild_title(session, ts, regression)
-    logger.info("Creating new Regression: {}".format(regression.title))
+    logger.info("Creating new Regression: {} from {} RIs".format(regression.title, len(new_ris)))
     session.commit()
     return regression, new_ris