Row name for Exception::rowNotMapped() and Exception::rowAlreadyMapped()

[fadoe]

In my project I get a exception "Row does not exist in IdentityMap.". It would be nice to have the row name in this exception text like "Row "blablub" does not exist in IdentityMap "fooBar"".

[froschdesign]

@fadoe
This exception no longer exists in version 3. I think, this issue can be closed.