Importing users through CSV map names as firstnamelastname
We should allow for other common formats like first letter of first name + last name. So John Smith becomes jsmith.
There will certainly be problems when we have "James Smith", but it will be up to the user to pre-prepare the import file in such circumstances (creating lookup columns etc)
settings.advanced.mapper.user = com.atlassian.jira.imports.csv.mappers.FirstInitialFirstNameUserMapper
Then you'll be able to import "John Smith" as "jsmith".