Does not support unique_constraint properly

[jdebsucks]

The Ecto.Changeset.unique_constraint is supposed to catch the Database error thrown when a unique key is violated. However this adapter does not seem to work. This is (part of) the logged error: ** (exit) an exception was raised:, ** (Tds.Error) Line 1 (Error 2627): Violation of UNIQUEKEY``. This is not caught by ecto properly and does not work. Not sure if the issue is this adapter or ecto but I figured I'd start here.

[mjaric]

I will check but I think this should be adapter issue probably. As I remeber i made macro that wraps around errors so error code and messages are captured correctly if en-US language is used.