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.
Fix placement of amplifier fields for land units

Change X and Y values for the AF, T, X and Z text amplifier fields for
land units. Checked against the latest 2525D document.
Fix placement of amplifier field for subsurf. unit

Change Y value for the H amplifier field for subsurface units
Add depth amplifier field for subsurface unit

The subsurface unit is missing the X text amplifier field for depth.
Updated svg database and simplified OCA

Latest SVG files
Reduced the number of operational condition amplifier icons.  They now
adhere to the four Standard Identity Groups (U, F, N, H).
Merge pull request #134 from abouffard/master

Amplifier field fixes, test data, and new SVG files