Map data to controlled vocabulary entries before validation

[rminnett]

After upload and before validation:

• [x] Case insensitive values should be replaced with the correct case from the controlled vocabularies
• [x] Values with an edit distance of 1 from the correct value are likely typos and should be fixed during upload
• [x] 't' and '1' should be mapped to 'True', and 'f' and '0' to 'False', if it's governed by a the Boolean vocabulary