[AIRFLOW-5653] Log caught AirflowSkipException in task instance log (a…

…pache#6330)

[AIRFLOW-5653] Log caught AirflowSkipException in task instance log

Logging any caught AirflowSkipException with message in models/taskinstance.py
to remove confusion due to no task skipping information in the logs

airflow/models/taskinstance.py

@@ -950,7 +950,10 @@ def signal_handler(signum, frame):
                 Stats.incr('ti_successes')
             self.refresh_from_db(lock_for_update=True)
             self.state = State.SUCCESS
-        except AirflowSkipException:
+        except AirflowSkipException as e:
+            # log only if exception has any arguments to prevent log flooding
+            if e.args:
+                self.log.info(e)
             self.refresh_from_db(lock_for_update=True)
             self.state = State.SKIPPED
         except AirflowRescheduleException as reschedule_exception: