Add validation rules to usage report

[nununo]

For each table found:

• If FIELDNAME has more than one word this is a multi. In this case
  • we need one value per FIELDNAME word
  • OPTION must be EQ
  • SIGN must be I
  • LOW must be filled
  • HIGH cannot be filled
  • INDEX must be 1 (only 1 line allowed because no ranges possible)

[nununo]

These validations have been added directly to the _DATA class in 83766c914931cf140e9ad95168962dd09a9d6167