Make misfire grace time and reporter start time configurable (#445) 🕰 🔥

Type: feature

Why:
When working with a large number of accounts, sometimes the run_reporter
is never run for some accounts.

There were two issues with the app scheduler configuration:
1) Jobs are scheduled before the scheduler starts and when there are
   a lot of accounts, some of the scheduled times fall before the
   scheduler is started.
2) There is a hardcoded misfire grace time of 30 seconds, meaning that
   if a job is scheduled and does not start within 30 seconds because
   of thread contention or other issues it will be cancelled.

This change addresses the need by:
Providing configurable times for the schedule start delay and the
misfire grace time

Potential Side Effects:
No known side effects

env-config/config-deploy.py

@@ -224,3 +224,9 @@
 REMEMBER_COOKIE_DURATION=timedelta(minutes=60)  # Can make longer if you want remember_me to be useful.
 REMEMBER_COOKIE_SECURE=True
 REMEMBER_COOKIE_HTTPONLY=True
+
+# Apscheduler Configurations
+# Length of time, in seconds, before a scheduled job is cancelled due to thread contention or other issues
+MISFIRE_GRACE_TIME=30
+# Delay, in seconds, until reporter starts
+REPORTER_START_DELAY=10

security_monkey/scheduler.py

@@ -93,7 +93,7 @@ def _clear_old_exceptions():
     standalone=True,
     threadpool=pool,
     coalesce=True,
-    misfire_grace_time=30
+    misfire_grace_time=app.config.get('MISFIRE_GRACE_TIME', 30)
 )
 
 def exception_listener(event):
@@ -109,13 +109,15 @@ def setup_scheduler():
         accounts = Account.query.filter(Account.third_party == False).filter(Account.active == True).all()  # noqa
         accounts = [account.name for account in accounts]
         for account in accounts:
- print "Scheduler adding account {}".format(account)
+ app.logger.debug("Scheduler adding account {}".format(account))
             rep = Reporter(account=account)
+            delay = app.config.get('REPORTER_START_DELAY', 10)
+
             for period in rep.get_intervals(account):
                 scheduler.add_interval_job(
                     run_change_reporter,
                     minutes=period,
-                    start_date=datetime.now()+timedelta(seconds=2),
+                    start_date=datetime.now()+timedelta(seconds=delay),
                     args=[[account], period]
                 )
             auditors = []