Ability to create seasonal report schedules in report manager

[ccoelho]

We have a use case where a report schedule is supposed to run daily/weekly only during certain months of the year(seasonal reports). This could be done using the time frame section in report manager, however, at the end of the season, we will need to manually update each of the schedule's start and end date, which may not be feasible when there are over 100s of schedules as such.

It will be really helpful to be have this ability in the schedules, so schedules can run only certain months in the years.