Update default image value in shaker

This change updates the default image value in the shaker chart
from newton to wallaby.

Change-Id: Icf638a0d896fc77aaf43f4d82ed2bd82aef13328

releasenotes/notes/shaker.yaml

@@ -5,4 +5,5 @@ shaker:
   - 0.1.2 Use full image ref for docker official images
   - 0.1.3 Fix helm3 linting issue
   - 0.1.4 Update htk requirements
+  - 0.1.5 Update default image value
 ...

shaker/Chart.yaml

@@ -15,7 +15,7 @@ apiVersion: v1
 appVersion: v1.0.0
 description: OpenStack-Helm Shaker
 name: shaker
-version: 0.1.4
+version: 0.1.5
 home: https://pyshaker.readthedocs.io/en/latest/index.html
 icon: https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcTlnnEExfz6H9bBFFDxsDm5mVTdKWOt6Hw2_3aJ7hVkNdDdTCrimQ
 sources:

shaker/values.yaml

@@ -28,7 +28,7 @@ images:
   tags:
     dep_check: quay.io/airshipit/kubernetes-entrypoint:v1.0.0
     shaker_run_tests: docker.io/performa/shaker:latest
-    ks_user: docker.io/openstackhelm/heat:newton-ubuntu_xenial
+    ks_user: docker.io/openstackhelm/heat:wallaby-ubuntu_focal
     image_repo_sync: docker.io/library/docker:17.07.0
   pull_policy: "IfNotPresent"
   local_registry: