docker: update following name changes:

`backend_e2e` now print properly backend logs

docker/docker-compose_e2e.yml

@@ -1,74 +0,0 @@
-version: "3.6"
-services:
-
-  prosody:
-    build: prosody_e2e
-    image: salutatoi/prosody_e2e
-    depends_on:
-      # we need to depend on sat to get IP address of the container for conf
-      - sat
-    tmpfs: /var/lib/prosody
-    tmpfs: /var/log/prosody
-    networks:
-      default:
-        aliases:
-          - server1.test
-          - server2.test
-          - server3.test
-
-  db:
-    image: postgres
-    environment:
-      POSTGRES_PASSWORD: test_e2e
-      POSTGRES_DB: pubsub
-    tmpfs: /var/lib/postgresql/data
-
-  pubsub:
-    build: pubsub
-    image: salutatoi/sat_pubsub
-    depends_on:
-      - db
-      - prosody
-    environment:
-      PGHOST: db
-      PGUSER: postgres
-      PGPASSWORD: test_e2e
-      SAT_PUBSUB_RHOST: server1.test
-      SAT_PUBSUB_JID: pubsub.server1.test
-      SAT_PUBSUB_XMPP_PWD: test_e2e
-
-  sat:
-    build: backend_e2e
-    image: salutatoi/sat_e2e
-    environment:
-      SAT_TEST_ENV_E2E: "1"
-      SAT_TEST_ENV_E2E_LIBERVIA: "1"
-    volumes:
-      - sat_data:/home/sat/.local/share/sat
-    ports:
-      # VNC server for Libervia e2e tests visual mode
-      - 5900
-    networks:
-      default:
-        aliases:
-          - sat.test
-
-  libervia:
-    image: salutatoi/libervia_e2e
-    build: libervia_e2e
-    depends_on:
-      - sat
-    environment:
-      LIBERVIA_PASSPHRASE: test_e2e
-    volumes:
-      - sat_data:/home/sat/.local/share/sat
-    ports:
-        - "8080"
-        - "8443"
-    networks:
-      default:
-        aliases:
-          - libervia.test
-
-volumes:
-  sat_data: