Fix issue with saving expert weightings across Hibernate transactions
Fix bugs in disease extent generation
Ensure that the disease extent is generated after the weightings have been updated
Improved logging in DataAcquisition post-QC processes.
Simplified the logic in ModelRunManagerHelper (the initial query ensures that all items in the "occurrences" list have isValidated = false).
Improve logging in Model Output Handler's ValidationParametersHandler
Ensure that empty HealthMap string fields are always written to the database as null.
Fixes following review
Fix comments
Optimise query
Merge pull request #128 from SEEG-Oxford/179-experts-saving-transaction

Various fixes resulting from a Data Acquisition dry run