* update seeds to add self in review env, change spec to reflect this, update config yml to allow csv exports in review
* update interface of relevant methods
EmailCsvJob, LettingsLog.to_csv and LettingsLogCsvService consume codes_only flag
* update tests including adding a new csv file to test against
* update LettingsLogCsvService to output codes only csv
* correct minor error and linting
* enable codes only download in UI
- add link on lettings log index page
- pass codes_only flag through params in relevant links and methods
- convert flag to boolean in controller methods
* ensure link displayed successfully for all renderings of logs_list and params passed through relevant methods in organisations controller
* fix existing tests
* correct linting thing
* correct linting error
* update tests for lettings log controller
* correct linting errors
* update organisations controller tests
* make minor changes after code review
* remove changes made for testing on review app
* make codes only download visible to support users only
* change variable names throughout after info on rauby/rails naming conventions, update tests for change in who can view codes only download link
* rework csv service for readability, remove delegating methods from lettings log to keep all code to do with mapping between our domain and desired export format in one place
* update test name
* correct a small typo and remove a duplicated method after clever git merge conflict suggestion
* point review app at staging csv bucket for csv download
* change variables named codes_only_export to codes_only to avoid inconsistency
* write tests to ensure that differetn user roles have the correct permissions around csv download
* ensure that non support users may not download codes only exports
* correct a small error in a previous commit
* correct minor linting error