Update Ubuntu 18.04 docker images

This updated image should have pull in the
newer version of python from the below CR.

https://gerrit.linuxfoundation.org/infra/c/ansible/roles/python-install/+/66854

Issue-ID: CIMAN-33
Change-Id: Iacfdde0e9ffdc5c5479bf0058fce1cfaff8c2025
Signed-off-by: Anil Belur <abelur@linuxfoundation.org>
diff --git a/jenkins-config/clouds/openstack/cattle/ubuntu1804-docker-8c-16g.cfg b/jenkins-config/clouds/openstack/cattle/ubuntu1804-docker-8c-16g.cfg
index 7ad0f8a..753d836 100644
--- a/jenkins-config/clouds/openstack/cattle/ubuntu1804-docker-8c-16g.cfg
+++ b/jenkins-config/clouds/openstack/cattle/ubuntu1804-docker-8c-16g.cfg
@@ -1,4 +1,4 @@
-IMAGE_NAME=ZZCI - Ubuntu 18.04 - docker - x86_64 - 20210223-063615.366
+IMAGE_NAME=ZZCI - Ubuntu 18.04 - docker - x86_64 - 20210306-131321.125
 LABELS=ubuntu1804-docker-8c-16g
 HARDWARE_ID=v2-highcpu-16
 VOLUME_SIZE=40