[train][goal] Define new 'solum-tempest-ipv6-only' job

As part of Train community goal 'Support IPv6-Only Deployments and Testing'[1],
Tempest has defined the base job 'devstack-tempest-ipv6' which will
deploy services on IPv6.

This commit adds the new job 'solum-tempest-ipv6-only'
run on gate which is derived from 'devstack-tempest-ipv6'.

Verification structure will be:
- 'devstack-IPv6' deploy the service on IPv6
- 'devstack-tempest-ipv6' run will verify the IPv6-only setting and listen address
- 'solum-tempest-ipv6-only' will run the tests.

Story: #2005477
Task: #35930

[1] https://governance.openstack.org/tc/goals/train/ipv6-support-and-testing.html

Change-Id: Ia7da63537eb90750e7b9a2c453e82d248b91037f

.zuul.yaml

@@ -12,6 +12,7 @@
         - solum-devstack
         - solum-devstack-centos-7
         - solum-devstack-py3
+        - solum-tempest-ipv6-only
         - solum-tox-bandit-baseline:
             voting: false
         - openstack-tox-py36:
@@ -20,6 +21,7 @@
       queue: solum
       jobs:
         - solum-devstack
+        - solum-tempest-ipv6-only
 
 - job:
     name: solum-devstack-centos-7
@@ -38,7 +40,7 @@
 - job:
     name: solum-tempest-base
     parent: devstack-tempest
-    irrelevant-files:
+    irrelevant-files: &base_irrelevant_files
       - ^(test-|)requirements.txt$
       - ^setup.cfg$
       - ^doc/.*$
@@ -46,7 +48,7 @@
       - ^releasenotes/.*$
       - ^solum/tests/.*$
     timeout: 7800
-    required-projects:
+    required-projects: &base_required_projects
       - openstack/devstack
       - openstack/devstack-gate
       - openstack/devstack-plugin-container
@@ -57,7 +59,7 @@
       - openstack/solum-tempest-plugin
       - openstack/zun
       - openstack/zun-tempest-plugin
-    vars:
+    vars: &base_vars
       devstack_plugins:
         solum: https://opendev.org/openstack/solum
         zun: https://opendev.org/openstack/zun
@@ -74,6 +76,16 @@
       tempest_test_regex: application_deployment
       tox_envlist: all
 
+- job:
+    name: solum-tempest-ipv6-only
+    parent: devstack-tempest-ipv6
+    description: |
+      Solum devstack tempest tests job for IPv6-only deployment
+    irrelevant-files: *base_irrelevant_files
+    required-projects: *base_required_projects
+    timeout: 7800
+    vars: *base_vars
+
 - job:
     name: solum-devstack
     parent: solum-tempest-base

devstack/plugin.sh

@@ -163,9 +163,9 @@ function configure_solum() {
     iniset $SOLUM_CONF_DIR/$SOLUM_CONF_FILE worker lp_operator_tenant_name service
 
     # configure the api servers to listen on
-    iniset $SOLUM_CONF_DIR/$SOLUM_CONF_FILE api host $SOLUM_SERVICE_HOST
+    iniset $SOLUM_CONF_DIR/$SOLUM_CONF_FILE api host $(ipv6_unquote $SOLUM_SERVICE_HOST)
     iniset $SOLUM_CONF_DIR/$SOLUM_CONF_FILE api port $SOLUM_SERVICE_PORT
-    iniset $SOLUM_CONF_DIR/$SOLUM_CONF_FILE builder host $SOLUM_SERVICE_HOST
+    iniset $SOLUM_CONF_DIR/$SOLUM_CONF_FILE builder host $(ipv6_unquote $SOLUM_SERVICE_HOST)
     iniset $SOLUM_CONF_DIR/$SOLUM_CONF_FILE builder port $SOLUM_BUILDER_SERVICE_PORT
 
     # configure assembly handler to create appropriate image format