OrderService.discontinueOrder throws Exception

Generic Exception thrown by OrderService.discontinueOrder

The throws clause should be removed.

Sonar reports this as major:
https://ci.openmrs.org/sonar/drilldown/issues/1865?&rule=squid%3AS00112&rule_sev=MAJOR&severity=MAJOR

checkstyle.xml configuration does not catch this case though
https://github.com/openmrs/openmrs-core/blob/2.0.x/tools/src/main/resources/checkstyle/openmrs-checkstyle.xml#L211-L215

so maybe checkstyle config should also be adjusted.

see discussion:
https://talk.openmrs.org/t/why-does-orderservice-discontinueorder-throws-exception/7446