Fix for blank characteristic types
Remove unneeded exception throwing
Minor whitespace cleanup
Cleanup old MySQL accessioning references
Merge branch 'master' of git@github.com:EBIBioSamples/sampletab_converters.git
Refactoring and minor fixes
Refactored and fixed various ERA PRO connection issues.
reduced logging verbosity
Refactor deletion detection
Ensure groups are complete
Only get updates to public samples
Clean imports
Reduce logging