Enable e2e testing with docker-compose on GitLab (#17765)

* Make testing with docker-compose work on GitLab.

* Comment heavy jobs.

* Make testing with docker-compose work on GitLab.

* Comment heavy jobs.

* Fix images

* Addressing review.

build/gitlab-dc.postgres.yml

@@ -0,0 +1,101 @@
+version: '2.4'
+services:
+  postgres:
+    image: ${CI_REGISTRY}/mattermost/ci/images/postgres:10-1
+    restart: always
+    environment:
+      POSTGRES_USER: mmuser
+      POSTGRES_PASSWORD: mostest
+      POSTGRES_DB: mattermost_test
+    command: postgres -c 'config_file=/etc/postgresql/postgresql.conf'
+    volumes:
+     - "./docker/postgres.conf:/etc/postgresql/postgresql.conf"
+    healthcheck:
+      test: [ "CMD", "pg_isready", "-h", "localhost" ]
+      interval: 5s
+      timeout: 10s
+      retries: 3
+    networks:
+      default:
+        aliases:
+          - postgres
+  minio:
+    extends:
+        file: gitlab-dc.common.yml
+        service: minio
+    networks:
+      default:
+        aliases:
+          - minio
+  inbucket:
+    extends:
+        file: gitlab-dc.common.yml
+        service: inbucket
+    networks:
+      default:
+        aliases:
+          - inbucket
+  openldap:
+    extends:
+        file: gitlab-dc.common.yml
+        service: openldap
+    networks:
+      default:
+        aliases:
+          - openldap
+  elasticsearch:
+    extends:
+        file: gitlab-dc.common.yml
+        service: elasticsearch
+    networks:
+      default:
+        aliases:
+          - elasticsearch
+  dejavu:
+    extends:
+        file: gitlab-dc.common.yml
+        service: dejavu
+    networks:
+      default:
+        aliases:
+          - dejavu
+  keycloak:
+    extends:
+        file: gitlab-dc.common.yml
+        service: keycloak
+  prometheus:
+    extends:
+        file: gitlab-dc.common.yml
+        service: prometheus
+    networks:
+      default:
+        aliases:
+          - prometheus
+  grafana:
+    extends:
+        file: gitlab-dc.common.yml
+        service: grafana
+    networks:
+      default:
+        aliases:
+          - grafana
+
+  start_dependencies:
+    image: ${CI_REGISTRY}/mattermost/ci/images/mattermost-wait-for-dep:latest-1
+    depends_on:
+      - postgres
+      - minio
+      - inbucket
+      - openldap
+      - elasticsearch
+      - prometheus
+      - grafana
+    command: postgres:5432 minio:9000 inbucket:10080 openldap:389 elasticsearch:9200 prometheus:9090 grafana:3000
+    networks:
+      default:
+
+
+networks:
+  default:
+    external:
+      name: ${COMPOSE_PROJECT_NAME}