Merge branch 'sh-fix-geo-spec-namespace' into 'master'

Fix JobArtifactUploader namespacing issues

Closes #4801

See merge request gitlab-org/gitlab-ee!4368

ee/lib/gitlab/geo/job_artifact_uploader.rb

 module Gitlab
   module Geo
-    class JobArtifactUploader < FileUploader
+    class JobArtifactUploader < ::Gitlab::Geo::FileUploader
       def execute
         job_artifact = ::Ci::JobArtifact.find_by(id: object_db_id)