Add property to MapperAttribute to use mappings from another mappers

[alekshura]

Add, for example UseMapper property to MapperAttribute to use defined mappings from another mappers classes

[alekshura]

In a case when few mappers defined in project, e.g.:

[Mapper]
public interface INotesMapper
{
     NoteDto MapToDto(NoteDao source);
}

and

[Mapper]
public interface IDocumentsMapper
{
     NoteDocumentDto MapToDto(NoteDocumentDao source);
}

and NoteDto and NoteDao contains DocumentDto and DocumentDao objects to be mapped,
INotesMapper can use already defined mappings for DocumentDto by injecting IDocumentsMapper mapper into INotesMapper.

To do this, define

[Mapper(UseMappers= new string[] { nameof(IDocumentsMapper), "AnotherMapper" }]
public interface INotesMapper

or

[Mapper(UseMapper= nameof(IDocumentsMapper)]
public interface INotesMapper