Update docker dind service to 19.03.0-dind
This change is inline with updating the docker service for other QA pipelines: https://gitlab.com/gitlab-org/quality/pipeline-common/merge_requests/10
We are seeing multiple failures since updating the runner that runs QA tests to 12.x
Also, these failures are seen in gitlab-qa pipeline as commented here: https://gitlab.com/gitlab-com/gl-infra/infrastructure/issues/8289#note_237725521
Example failure job: https://ops.gitlab.net/gitlab-org/gitlab-qa/-/jobs/706302
Edited by George Koltsov