test(rlog): reenable RLOG FVT tests

The RLOG DB backend tests in FVT were temporarily disabled due to some
paho tests being specially flaky in CI.

In particular, those tests had the common pattern of subscribing to a
topic, immediately publishing to that topic and then waiting for the
response.  When in CI and using RLOG, there seems to be more delays in
replication of data, and often this pattern would fail in the
constraint testing enviroment.

.ci/docker-compose-file/docker-compose-emqx-cluster-rlog.override.yaml

@@ -12,6 +12,7 @@ services:
   emqx1:
     <<: *default-emqx
     container_name: node1.emqx.io
+    restart: on-failure
     environment:
       - "EMQX_HOST=node1.emqx.io"
       - "EMQX_CLUSTER__DB_BACKEND=rlog"
@@ -23,6 +24,9 @@ services:
   emqx2:
     <<: *default-emqx
     container_name: node2.emqx.io
+    depends_on:
+      - emqx1
+    restart: on-failure
     environment:
       - "EMQX_HOST=node2.emqx.io"
       - "EMQX_CLUSTER__DB_BACKEND=rlog"

.ci/docker-compose-file/python/pytest.sh

@@ -18,7 +18,7 @@ else
 fi
 
 apk update && apk add git curl
-git clone -b develop-4.0 https://github.com/emqx/paho.mqtt.testing.git /paho.mqtt.testing
+git clone -b develop-4.0-2 https://github.com/thalesmg/paho.mqtt.testing.git /paho.mqtt.testing
 pip install pytest
 
 pytest -v /paho.mqtt.testing/interoperability/test_client/V5/test_connect.py -k test_basic --host "$TARGET_HOST"

.github/workflows/run_fvt_tests.yaml

@@ -73,8 +73,7 @@ jobs:
           - 24.1.1-emqx-1
         cluster_db_backend:
           - "mnesia"
-          # FIXME: temporarily disabled: too flaky at the moment
-          # - "rlog"
+          - "rlog"
 
     steps:
     - uses: actions/download-artifact@v2
@@ -182,8 +181,8 @@ jobs:
         kubectl logs emqx-2
     - uses: actions/checkout@v2
       with:
-        repository: emqx/paho.mqtt.testing
-        ref: develop-4.0
+        repository: thalesmg/paho.mqtt.testing
+        ref: develop-4.0-2
         path: paho.mqtt.testing
     - name: install pytest
       run: |