gitlab connector assigns name as username

[pfijalki]

In
https://github.com/concourse/dex/blob/master/connector/gitlab/gitlab.go:187

one can find

	ident.Name = name
	ident.Username = name
        ident.Email = user.Email

probably should be

ident.Username  = user.Username

which seems to be incorrect assingment

[vito]

@pivotal-jwinters Looks like this is something changed in our fork, do you think it should be changed? (Is it too late? Is this going to break people using GitLab integration?)

[jwntrs]

@vito @pfijalki yeah it should probably be changed to user.Username

[tuapuikia]

Now I know why it failed when I use gitlab username instead of gitlab user full name.