Database reviewers

With the review roulette in place (https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/24938), we now have the ability to suggest reviewers and maintainers for review/merge.

For database, I would like to nominate @yguo, @cshobe and @fjsanpedro for database reviewers.

An example of how the result of the review roulette looks like is: https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/7361#note_101230798

A database reviewer is going to show up for any MR labeled Database. The idea is for the reviewer to take a first stab at the MR before passing it on to a maintainer. Note the danger roulette is only a suggestion and the MR author may pick other people as per https://docs.gitlab.com/ee/development/code_review.html.

data/team.yml

@@ -4085,8 +4085,12 @@
     - Create BE Team
   projects:
     customers-app: maintainer
-    gitlab-ce: reviewer backend
-    gitlab-ee: reviewer backend
+    gitlab-ce:
+      - reviewer backend
+      - reviewer database
+    gitlab-ee:
+      - reviewer backend
+      - reviewer database
   expertise: |
              <li><a href="https://docs.gitlab.com/ee/user/project/wiki/">Wiki</a> <a href="/company/team/structure/#expert">expert</a></li>
   story:  |
@@ -9393,6 +9397,9 @@
   departments:
     - Engineering Function
     - Infrastructure Department
+  projects:
+    gitlab-ce: reviewer database
+    gitlab-ee: reviewer database
   story:  |
            Yun is a passionate database engineer with devops mindset. She obtained a Ph.D at George Mason University. Her research interests include SQL fault localization, automatic fault repair, and software testing. When not at work, she enjoys cuddling with her dog, traveling, and kickboxing.
@@ -12435,6 +12442,9 @@
   gitlab: cshobe
   departments:
     - Engineering Function
+  projects:
+    gitlab-ce: reviewer database
+    gitlab-ee: reviewer database
   story: Casey brings over 15 years of PostgreSQL experience to GitLab, and is passionate about this technology, as well as improving efficiency in general.  He is a husband and father of three, currently residing in central Utah.
 - slug: dbre-infrastructure-js-as