Strings gets implicitly converted to a number on arjdbc/sqlite3

This test `test_converted_values_are_returned_after_assignment` is passes on CRuby but fails on JRuby with following message:

```ruby
ruby 1.7.12 (1.9.3p392) 2014-04-15 643e292 on Java HotSpot(TM) 64-Bit Server VM 1.7.0_51-b13 Using jdbcsqlite3
Run options: -n test_converted_values_are_returned_after_assignment --seed 60208

# Running:

F

Finished in 0.198000s, 5.0505 runs/s, 35.3535 assertions/s.

  1) Failure:
AttributeMethodsTest#test_converted_values_are_returned_after_assignment [test/cases/attribute_methods_test.rb:568]:
Expected 1337 to be a kind of String, not Fixnum.

1 runs, 7 assertions, 1 failures, 0 errors, 0 skips
```

so somewhere something similar to `"1337".to_i` is being done. The problem is that if I am expected value from column should be a `String`, it returns a Number. then things can blow up.

Any idea why/how this is happening?


#11700