The MS webapp used to create uppercase UUIDs. Most setups won't experience it because they used the hybrid version but older setups might (like Niger).
We tried to detect the data type of DB columns but it's a mess. Some are of `uniqueidentifier` type but others are plain char(32) or char(36). So we resorted to adding a check in the string formatting itself.

Additionally, the tool was only based on the new DB column list, so in tblLanguages, a country_code appeared in Postgres, causing a missing column error on the source. We now take the common denominator between the old and new columns.

A few fixes to migtool uuid & common list of cols