AuditLogHelper: return null instead of index error

[labkey-nicka]

Rationale

When using AuditLogHelper in testing it can result in an OOB exception that prevent the test from continuing. Instead, perform checks for length and return null otherwise.

Related Pull Requests

• https://github.com/LabKey/limsModules/pull/1584

Changes

• Update getLastDomainEvent() and getLastDomainEventId() to return null instead of throwing an OOB exception
• Make getDomainAuditEventLog() filter for the domain name directly. Consistent with getDomainPropertyEventLog(). Requires case-sensitive domain name.
• Update getDomainAuditEventLog() to support specifying a maxRows argument. Utilized when finding last audit event.