RFE - Ability to set previous month and current month usage in static reports

[lcouzens]

After the enhancements from #89 it would be really useful to be able to specify full_period usage for each month independently when using start_date: last_month

Basically when doing delta API using static reports all the generation is currently using start_date: last_month and full_period: x meaning the deltas are coming back as 0 or null.

In order to improve these tests we want to be able to use something like start_date: last_month, full_period_last_month: x and full_period_current_month: x thus generating some calculable delta values.

@dccurtis Thoughts on this?

[dccurtis]

@lcouzens Sounds good. Yeah I know we've talked about improving the dates that the usage periods apply to. Sounds like it's time to make that enhancement.