Validation error when using any CronStringFormat other then the default

[ahanley]

*/1 * * * * *
[ArgumentException: CRON expression is invalid. Please see the inner exception for details.
Parameter name: cronExpression]
Hangfire.RecurringDateRange.Server.RecurringDateRangeJobManager.ValidateCronExpression(String cronExpression) +274

[jcoutch]

@ahanley - I see what's happening. The cron string format is getting applied by the job processor, but the job manager doesn't take it into account. I may have to re-work this a bit, so that the cron string format is stored on the job. Then, passing the format to RecurringDateRangeJobScheduler wouldn't be needed. Plus, this would make things a bit more dynamic - you could then have different cron string formats for different jobs.

If this is something you feel comfortable implementing, feel free to submit a pull request. Otherwise, it may be a few days before I can get to it.