Merge branch 'rs-moar-runners' into 'master'

Increase rspec parallelization to 50

See merge request gitlab-org/gitlab-ce!23149

.gitlab-ci.yml

@@ -463,19 +463,19 @@ danger-review:
 
 rspec-pg:
   <<: *rspec-metadata-pg
-  parallel: 30
+  parallel: 50
 
 rspec-mysql:
   <<: *rspec-metadata-mysql
-  parallel: 30
+  parallel: 50
 
 rspec-pg-rails4:
   <<: *rspec-metadata-pg-rails4
-  parallel: 30
+  parallel: 50
 
 rspec-mysql-rails4:
   <<: *rspec-metadata-mysql-rails4
-  parallel: 30
+  parallel: 50
 
 static-analysis:
   <<: *dedicated-no-docs-no-db-pull-cache-job