[VOL-5358] - build & test repo using new AMI image

jjb/api-test.yaml
jjb/bbr.yaml
jjb/device-management.yaml
jjb/omec-ci.yaml
jjb/triggered-api-test.yaml
jjb/verify/bbsim.yaml
jjb/verify/ofagent-go.yaml
jjb/verify/voltha-go.yaml
jjb/verify/voltha-lib-go.yaml
jjb/verify/voltha-northbound-bbf-adapter.yaml
jjb/verify/voltha-openolt-adapter.yaml
jjb/verify/voltha-openonu-adapter-go.yaml
jjb/verify/voltha-protos.yaml
jjb/verify/voltha-system-tests.yaml
jjb/verify/xos.yaml
jjb/voltha-e2e/master.yaml
jjb/voltha-e2e/voltha-2.11.yaml
jjb/voltha-e2e/voltha-2.12.yaml
jjb/voltha-e2e.yaml
jjb/voltha-unit-test.yaml
jjb/xos-auth.yaml
jjb/xos-integration-tests.yaml
jjb/xos-synchronizer-update.yaml
jjb/xos-upgrade.yaml
--------------------------------------------
  o Update jenkins node ubuntu18.04-basebuild-4c-8g
    with replacement AMI image voltha-1804-micro.
  o Yes image names need to be more descriptive but
    get pipelines functional again first.

Change-Id: Ia2e6385992260cd284365b925e2219c683580639
diff --git a/jjb/defaults.yaml b/jjb/defaults.yaml
index c5c4e13..a285d98 100644
--- a/jjb/defaults.yaml
+++ b/jjb/defaults.yaml
@@ -61,7 +61,7 @@
     # The most frequently used type of Build Executor. Name is per the LF global-jjb.
     # See build node types under "Cloud > Amazon EC2" at
     #  https://jenkins.opencord.org/configure
-    build-node: ubuntu18.04-basebuild-1c-1g
+    build-node: 'ubuntu18.04-basebuild-1c-1g'
 
     # CORD Gerrit server definition, set in configuration
     gerrit-server-name: 'CORD Gerrit'