Merge ~powersj/cloud-init:enable-bionic into cloud-init:master

[Joshua Powers]

tests: Enable bionic in integration tests

Initial test successful:
https://paste.ubuntu.com/26022031/

Full test successful:
https://paste.ubuntu.com/26022129/

[Server Team CI bot (server-team-bot)]

PASSED: Continuous integration, rev:72d1cec6591dc1e70f83ce63ad857992cdfbe693
https://jenkins.ubuntu.com/server/job/cloud-init-ci/538/
Executed test runs:
    SUCCESS: Checkout
    SUCCESS: Unit & Style Tests
    SUCCESS: Ubuntu LTS: Build
    SUCCESS: Ubuntu LTS: Integration
    SUCCESS: MAAS Compatability Testing
    IN_PROGRESS: Declarative: Post Actions

Click here to trigger a rebuild:
https://jenkins.ubuntu.com/server/job/cloud-init-ci/538/rebuild

review: Approve (continuous-integration)

diff --git a/tests/cloud_tests/releases.yaml b/tests/cloud_tests/releases.yaml
index ec7e2d5..e593380 100644
--- a/tests/cloud_tests/releases.yaml
+++ b/tests/cloud_tests/releases.yaml
@@ -122,6 +122,22 @@ features:
 
 releases:
     # UBUNTU =================================================================
+    bionic:
+        # EOL: Apr 2023
+        default:
+            enabled: true
+            release: bionic
+            version: 18.04
+            family: ubuntu
+            feature_groups:
+                - base
+                - debian_base
+                - ubuntu_specific
+        lxd:
+            sstreams_server: https://cloud-images.ubuntu.com/daily
+            alias: bionic
+            setup_overrides: null
+            override_templates: false
     artful:
         # EOL: Jul 2018
         default: