Emergency Closure ignores library setting bill.prohibit_negative_balance_default

[Michele Morgan]

Evergreen 3.4

The Emergency Closing Handler voids overdue billings unless the library setting bill.prohibit_negative_balance_on_overdues is set to TRUE.

When a library prohibits all negative balances, the setting bill.prohibit_negative_balance_default is set to TRUE and there is no need to set the setting specific to overdues.

The Emergency Closing handler consults bill.prohibit_negative_balance_on_overdues:

https://git.evergreen-ils.org/?p=Evergreen.git;a=blob;f=Open-ILS/src/sql/Pg/096.schema.emergency_closing.sql;h=88abf35409e1e0872c81ca24d3e65be097cdca69;hb=5caa4344f460f8496589b641854634cf799a6dca#l325

using this statement:

SELECT value::BOOL INTO avoid_negative FROM actor.org_unit_ancestor_setting('bill.prohibit_negative_balance_on_overdues', circ.circ_lib);

bill.prohibit_negative_balance_default also needs to be tested when setting avoid_negative.