Update TestLegacyCodes to use better test dataset

The previous one (SymbolInfo.csv) looked like it had lots of
errors/redundant data, so switched to a better/vetted one.
Merge pull request #128 from csmoore/master

Update TestLegacyCodes to use better test dataset
Merge pull request #130 from kjellmf/master

Modify placement of some text amplifier fields for land and subsurface units