Adding back intergation-etsi job

Images are updated now see https://gerrit.onap.org/r/c/integration/csit/+/127144

Change-Id: Ic03e7b04bb18c102bc7148b2a09841b9d2a529e2
Issue-ID: SO-3632
Signed-off-by: waqas.ikram <waqas.ikram@est.tech>

jjb/so/so-csit.yaml

@@ -18,12 +18,8 @@
           branch: 'Custom_Workflow'
           java-version: openjdk11
     functionality:
-# integration testing suites disabled until brought up to date,
-# see https://jira.onap.org/browse/SO-3632
-#      - 'integration-testing':
-#          trigger_jobs:
-#      - 'integration-etsi-testing':
-#          trigger_jobs:
+      - 'integration-etsi-testing':
+          trigger_jobs:
       - 'macroflow':
           trigger_jobs:
     robot-options: ''