Contributors graph not grouped by email
### Summary
Contributors graph display multiple graph for same email adress but different name
### Steps to reproduce
Commit from the same account but configured with two different full name. This will lead to 2 differents graph in the contributors graph
### What is the current *bug* behavior?
Contributors graph display multiple graph for the same account (and same email) because full name are different.
As you can see in the following capture (Gitlab CE 12.7 , omnibus install) the same account , using the same email appears 4 times because it as 4 differents names
### What is the expected *correct* behavior?
The contributors graph should group by account meaning :
- Differents names with same email account should lead to one graph
- Differents names with differents email linked to same gitlab account should also lead to one graph
- Same names but differents emails (probably homonym) should lead to multiple graph (#24430)
### Relevant logs and/or screenshots
#### Results of GitLab environment info
<details>
<summary>Expand for output related to GitLab environment info</summary>
<pre>
System information
System: Ubuntu 16.04
Current User: git
Using RVM: no
Ruby Version: 2.6.5p114
Gem Version: 2.7.10
Bundler Version:1.17.3
Rake Version: 12.3.3
Redis Version: 5.0.7
Git Version: 2.24.1
Sidekiq Version:5.2.7
Go Version: unknown
GitLab information
Version: 12.7.0
Revision: 680a5284470
Directory: /opt/gitlab/embedded/service/gitlab-rails
DB Adapter: PostgreSQL
DB Version: 10.9
URL: http://10.200.11.227
HTTP Clone URL: http://10.200.11.227/some-group/some-project.git
SSH Clone URL: git@10.200.11.227:some-group/some-project.git
Using LDAP: no
Using Omniauth: yes
Omniauth Providers:
GitLab Shell
Version: 11.0.0
Repository storage paths:
- default: /var/opt/gitlab/git-data/repositories
GitLab Shell path: /opt/gitlab/embedded/service/gitlab-shell
Git: /opt/gitlab/embedded/bin/git
</pre>
</details>
#### Results of GitLab application Check
<details>
<summary>Expand for output related to the GitLab application check</summary>
<pre>
Checking GitLab subtasks ...
Checking GitLab Shell ...
GitLab Shell: ... GitLab Shell version >= 11.0.0 ? ... OK (11.0.0)
Running /opt/gitlab/embedded/service/gitlab-shell/bin/check
Internal API available: OK
Redis available via internal API: OK
gitlab-shell self-check successful
Checking GitLab Shell ... Finished
Checking Gitaly ...
Gitaly: ... default ... OK
Checking Gitaly ... Finished
Checking Sidekiq ...
Sidekiq: ... Running? ... yes
Number of Sidekiq processes ... 1
Checking Sidekiq ... Finished
Checking Incoming Email ...
Incoming Email: ... Reply by email is disabled in config/gitlab.yml
Checking Incoming Email ... Finished
Checking LDAP ...
LDAP: ... LDAP is disabled in config/gitlab.yml
Checking LDAP ... Finished
Checking GitLab App ...
Git configured correctly? ... yes
Database config exists? ... yes
All migrations up? ... yes
Database contains orphaned GroupMembers? ... no
GitLab config exists? ... yes
GitLab config up to date? ... yes
Log directory writable? ... yes
Tmp directory writable? ... yes
Uploads directory exists? ... yes
Uploads directory has correct permissions? ... yes
Uploads directory tmp has correct permissions? ... yes
Init script exists? ... skipped (omnibus-gitlab has no init script)
Init script up-to-date? ... skipped (omnibus-gitlab has no init script)
Projects have namespace: ...
3/1 ... yes
3/2 ... yes
3/3 ... yes
15/4 ... yes
3/5 ... yes
18/6 ... yes
18/7 ... yes
18/8 ... yes
18/9 ... yes
18/10 ... yes
18/11 ... yes
15/14 ... yes
15/15 ... yes
15/16 ... yes
15/17 ... yes
15/18 ... yes
18/19 ... yes
3/20 ... yes
3/21 ... yes
22/22 ... yes
18/23 ... yes
16/27 ... yes
16/28 ... yes
18/29 ... yes
17/32 ... yes
17/33 ... yes
15/35 ... yes
15/36 ... yes
15/37 ... yes
17/38 ... yes
3/39 ... yes
17/40 ... yes
17/41 ... yes
22/42 ... yes
17/43 ... yes
5/45 ... yes
17/46 ... yes
25/47 ... yes
25/48 ... yes
16/49 ... yes
25/50 ... yes
17/51 ... yes
16/52 ... yes
16/53 ... yes
18/54 ... yes
3/55 ... yes
15/56 ... yes
22/57 ... yes
26/58 ... yes
16/59 ... yes
16/60 ... yes
17/62 ... yes
16/63 ... yes
17/64 ... yes
16/65 ... yes
16/67 ... yes
9/68 ... yes
17/70 ... yes
18/71 ... yes
13/73 ... yes
16/74 ... yes
25/75 ... yes
16/76 ... yes
15/77 ... yes
15/78 ... yes
17/80 ... yes
17/81 ... yes
30/82 ... yes
30/83 ... yes
30/84 ... yes
30/85 ... yes
30/86 ... yes
18/87 ... yes
3/88 ... yes
22/89 ... yes
17/90 ... yes
18/91 ... yes
11/93 ... yes
16/94 ... yes
9/95 ... yes
11/96 ... yes
Redis version >= 2.8.0? ... yes
Ruby version >= 2.5.3 ? ... yes (2.6.5)
Git version >= 2.22.0 ? ... yes (2.24.1)
Git user has default SSH configuration? ... yes
Active users: ... 22
Is authorized keys file accessible? ... yes
Checking GitLab App ... Finished
Checking GitLab subtasks ... Finished
</pre>
</details>
@gitlab-org/triage
issue