Fix and re-enable tests/005.phpt

[Jon4t4n]

tests/005.phpt was disabled in PR #39. We want to fix this and re-enable the test.

The issue is that we don't get the error message that the test expected. Do we have a bug in the test or extension that causes Firebird to return the wrong error message? Or are we running a newer Firebird version in CI, and the error message was updated? I.e., we could update the expected message.

Expected error:

lock conflict on no wait transaction deadlock

Real error:

deadlock read conflicts with concurrent update concurrent transaction number is