* Name the score of the election in ElectionFinalized event

* fmt

* 1.Adjust the logic of the function 'do_elect()'.
2.Add one test that does ElectionCompute::Signed and one that does ElectionCompute::Unsigned to check 'Event::SolutionStored' and 'Event::ElectionFinalized'

* Fix from kian

* fmt and update comment.

Co-authored-by: kianenigma <kian@parity.io>