Test to demonstrate incorrect NUMERIC database type automapping to inherited generic field

[pavelda2]

NUMERIC type is not correctly automapped to generic field when filed is declared in 3rd and higher parent class.

Commit contains three JUnit tests:

1. firstLevelInheritedField -> PASSING
2. secondLevelInheritedField -> PASSING
3. thirdLevelInheritedField -> FAILING, Inherited filed ID id should be automapped to Integer like in previous test cases. But field is of type BigDecimal at runtime.

[harawata]

Fixed. See #1260