Erroneous DBH values of 5005 or 5000.5

[bmaitner]

A subset of the DBH values in the trait table are incorrect (DBH records with trait_value = '5005' OR trait_value = '5000.5'). This issue stems from a previous version of the analytical_stem table containing these values for CTFS plots. Presumably this was meant to encode a NA value. The issue has since been corrected in the analytical_stem table but remains in the trait table (which has not been refreshed recently). This issue will be corrected in the next trait table update.