Failure to resolve a title should lead to skipping title

In the case that attempting to resolve an incoming title generates an error (rather than successfully matching an existing titleInstance, or creating a new titleInstance), then the title in question should be skipped and the ingest job should continue.

There is currently at least one instance where this does not occur. In situations where https://github.com/folio-org/mod-agreements/blob/4c248d70511e5d903a6061bfba78bd7e2f638052/service/grails-app/services/org/olf/TitleInstanceResolverService.groovy#L530 fails then the job is left as "in process" indefinitely rather than moving to next title (see comments on ERM-1649)