We should provide time-out functionality

[msuchard]

Really helpful in some data sources would be a time-out feature in which the package kills a query (and then importantly continues onto the next task) that executes for longer than a specified time.

Might this be easily feasible @azimov @anthonysena ?

[azimov]

I think this should be possible to implement with something like R.utils::withTimeout though we would need to test how well this plays with DatabaseConnector and its calls to java.

I think there are some other questions about the default behaviour - I assume this is to have no timeout rather than assert that no cohort should take more than 10 hours to execute?

[anthonysena]

Think we'll need to think about the behavior but seems possible and reasonable. I suppose we'd want to apply a uniform timeout to call cohort generations in this case. I agree with @azimov that we'd want to test this out to make sure that the timeout plays nicely with database connections.