Old branch don't use python3

Change-Id: Icdd8b5a178527fec7479bf518eb4a0792eb35c21
diff --git a/.zuul.yaml b/.zuul.yaml
index 571c930..0711f5c 100644
--- a/.zuul.yaml
+++ b/.zuul.yaml
@@ -40,7 +40,17 @@
 - job:
     name: telemetry-dsvm-integration
     parent: telemetry-tempest-base
-    branches: ^(?!stable/(ocata|pike|queens|rocky)).*$
+    branches: ^(?!stable/(ocata|pike|queens|rocky|stein|train)).*$
+
+- job:
+    name: telemetry-dsvm-integration
+    parent: telemetry-tempest-base
+    branches:
+      - stable/stein
+      - stable/train
+    vars:
+      devstack_localrc:
+        USE_PYTHON3: False
 
 - job:
     name: telemetry-dsvm-integration
@@ -51,6 +61,7 @@
       - stable/rocky
     vars:
       devstack_localrc:
+        USE_PYTHON3: False
         GNOCCHI_ARCHIVE_POLICY_TEMPEST: "ceilometer-high"
         GNOCCHI_ARCHIVE_POLICY: "high"
         CEILOMETER_ALARM_AGGREGATION_METHOD: "mean"
@@ -59,7 +70,7 @@
 - job:
     name: telemetry-dsvm-integration-ipv6-only
     parent: devstack-tempest-ipv6
-    branches: ^(?!stable/(ocata|pike|queens|rocky)).*$
+    branches: ^(?!stable/(ocata|pike|queens|rocky|stein)).*$
     description: |
       Telemetry devstack tempest tests job for IPv6-only deployment
     required-projects: *base_required_projects