GitLab

Refactors tests & move parser functionality out of KafkaTopology.kt.

Numbers for stored as doubles and transformed into strings.

If a cell is numeric the string
value cannot be retrieved directly.

Merge branch 'master' of gitlab.switch.ch:memoriav/memobase-2020/services/import-process/table-data-transform

- Sheet index is now offset to one based.
- Filters empty rows.
- Improves error message for identifier errors.
- Properly transform cell values.

Will now continue working on the rows and
simply report the invalid identifiers per row.

getCell is zero based.