GitLab vendor appears for some vulnerabilities only on the Security Dashboard

Summary

For some vulnerabilities (not all), the "GitLab" vendor appears.

Steps to reproduce

Example Project

https://gitlab.com/gitlab-org/gitlab/-/security/dashboard/?state=DETECTED&state=CONFIRMED

What is the current bug behavior?

Some Vulnerabilities have a scanner "SAST", some other "SAST GitLab".

What is the expected correct behavior?

Consistent display. My suggestion is to skip the vendor if it's "GitLab".

Relevant logs and/or screenshots

Screen_Shot_2020-10-14_at_16.07.28

Output of checks

This bug happens on GitLab.com

Results of GitLab environment info

Expand for output related to GitLab environment info
(For installations with omnibus-gitlab package run and paste the output of:
`sudo gitlab-rake gitlab:env:info`)

(For installations from source run and paste the output of:
`sudo -u git -H bundle exec rake gitlab:env:info RAILS_ENV=production`)

Results of GitLab application Check

Expand for output related to the GitLab application check

(For installations with omnibus-gitlab package run and paste the output of: sudo gitlab-rake gitlab:check SANITIZE=true)

(For installations from source run and paste the output of: sudo -u git -H bundle exec rake gitlab:check RAILS_ENV=production SANITIZE=true)

(we will only investigate if the tests are passing)

Possible fixes

/cc @lkerr @thiagocsf @matt_wilson