ReactiveSqlQueryRow expects boolean fields to be Int

[rrrship]

When migrating from the non-reactive Eventuate stack to reactive, then all the examples and SQLs had the saga_instance fields as boolean, which means the reactive stack won't work as expected, because it expects these fields to be Integer, having 0 or 1 values.

Changing the getBoolean method to just handle boolean types fixed the issue. I can provide a PR if this change makes sense?

[cer]

Sorry for the delay. Yes, please provide a PR.