Don't verify redhat-appstudio/dance-bootstrap-app

This is the upstream change related to the following downstream changes to
make sure everything stays in sync.

- redhat-appstudio/tssc-sample-jenkins#5
- https://github.com/redhat-appstudio/tssc-sample-pipelines/pull/54/files

Explanation: For various reasons quay.io/redhat-appstudio/dance-bootstrap-app
will never pass an EC check, so try to validate it.

This was causing problems during QE testing of the Jenkins pipeline in RHTAP
1.2.

Ref: https://issues.redhat.com/browse/RHTAPBUGS-1284

task/gather-deploy-images/0.1/gather-deploy-images.yaml

@@ -53,6 +53,13 @@ spec:
             # don't check images that didn't change between the current revision and the target branch
             continue
           fi
+
+        fi
+
+        # Workaround for RHTAPBUGS-1284
+        if [[ "$image" =~ "quay.io/redhat-appstudio/dance-bootstrap-app" ]]; then
+          # Don't check the dance-bootstrap-app image
+          continue
         fi
 
         printf "%s\n" "$image"