Deploy Keys has user_id

Summary

Deploy Keys has user_id:

gitlabhq_production=# select id, user_id, title from keys where type LiKE 'DeployKey';
 id | user_id |                   title
----+---------+-------------------------------------------
 48 |         | jenkins@test12    <- old key (no user_id)
 57 |      73 | srv (legacy key)  <- new key (has user_id)

Steps to reproduce

Create new Deploy Key for the project.

What is the current bug behavior?

We have a user name in output:

$ ssh -T git@gitlab -i ~/.ssh/srv
Welcome to GitLab, Borys Borysenko!

What is the expected correct behavior?

No user name in output:

$ ssh -T git@gitlab -i ~/.ssh/id_rsa
Welcome to GitLab, Anonymous!

Results of GitLab environment info

[root@gitlab ~]# gitlab-rake gitlab:env:info

System information
System:
Current User:	git
Using RVM:	no
Ruby Version:	2.3.3p222
Gem Version:	2.6.6
Bundler Version:1.13.7
Rake Version:	10.5.0
Redis Version:	3.2.5
Git Version:	2.13.0
Sidekiq Version:5.0.0
Go Version:	unknown

GitLab information
Version:	9.3.9
Revision:	755bb71
Directory:	/opt/gitlab/embedded/service/gitlab-rails
DB Adapter:	postgresql
URL:		https://gitlab.owox.com
HTTP Clone URL:	https://gitlab.owox.com/some-group/some-project.git
SSH Clone URL:	git@gitlab.owox.com:some-group/some-project.git
Using LDAP:	no
Using Omniauth:	no

GitLab Shell
Version:	5.1.1
Repository storage paths:
- default: 	/var/opt/gitlab/git-data/repositories
Hooks:		/opt/gitlab/embedded/service/gitlab-shell/hooks
Git:		/opt/gitlab/embedded/bin/git

Results of GitLab application Check

Everything is ok (green).