[FIX] base, ir_sequence: fixes in date range creation (was made twice) and in update_no_gap (name instead of table was used)
[FIX] base, ir_sequence test: encapsulated all tests into try...finally in order to make sure the cursors are always closed even if one of the assert fails (was previously blocking the build which results in a killed instance and no complete error report) + fixed the test related to date ranges use