Verification reporting: Impossible match is detected just for equality operator

The feature of detecting impossible match stopped to work for condition columns that uses operators less than and greater than. If the condition columns uses equality operator, then the impossible match is detected.

Steps to reproduce:

1. Create Guided Decision Table
2. Create two columns that do check like: p : Person(name == [value])
3. Append row into table
4. In first column check that name equals to "John"
5. In second column check that name equals to "john"
6. Impossible match is detected in this case
7. Create another Guided Decision table
8. Create one column that do check like: p : Person(age < [value])
9. Create other column that do check like: p : Person(age > [value])
10. Append row into the table
11. Check that age is less than 10 in first column
12. Check that age is greater than 20 in second column
13. Impossible match is not thrown, but it is expected