Update powerdns default image values

This change updates the default image values for the powerdns chart
from queens to wallaby where it uses the heat image.

Change-Id: I060436fca42870bcd61f4972303d3b6970128875

powerdns/Chart.yaml

@@ -15,7 +15,7 @@ apiVersion: v1
 appVersion: v4.1.10
 description: OpenStack-Helm PowerDNS
 name: powerdns
-version: 0.1.4
+version: 0.1.5
 home: https://www.powerdns.com/
 maintainers:
   - name: OpenStack-Helm Authors

powerdns/values.yaml

@@ -19,7 +19,7 @@
 images:
   tags:
     powerdns: docker.io/psitrax/powerdns:4.1.10
-    db_init: docker.io/openstackhelm/heat:queens-ubuntu_xenial
+    db_init: docker.io/openstackhelm/heat:wallaby-ubuntu_focal
     db_sync: docker.io/psitrax/powerdns:4.1.10
     dep_check: quay.io/airshipit/kubernetes-entrypoint:v1.0.0
     image_repo_sync: docker.io/library/docker:17.07.0

releasenotes/notes/powerdns.yaml

@@ -5,4 +5,5 @@ powerdns:
   - 0.1.2 Use full image ref for docker official images
   - 0.1.3 Helm 3 - Fix Job labels
   - 0.1.4 Update htk requirements
+  - 0.1.5 Update default image values
 ...