Put syncback iteration log line at 'debug' level also
Put syncback iteration log line at 'debug' level also

closeio/nylas,jobscore/sync-engine,closeio/nylas,nylas/sync-engine,jobscore/sync-engine,nylas/sync-engine,closeio/nylas,jobscore/sync-engine,jobscore/sync-engine,nylas/sync-engine,closeio/nylas,nylas/sync-engine