Add volume size for cloud instances

The value is now needed to be defined with the latest
cloud provider upgrades.

Issue-ID: CIMAN-33
Signed-off-by: Jessica Wagantall <jwagantall@linuxfoundation.org>
Change-Id: Iad3cb5ca9763fe74a9086b37a7ca2b86fb7d175f
diff --git a/jenkins-config/clouds/openstack/cattle/ubuntu1804-docker-v1-8c-8g.cfg b/jenkins-config/clouds/openstack/cattle/ubuntu1804-docker-v1-8c-8g.cfg
index 3d474c9..a997a04 100644
--- a/jenkins-config/clouds/openstack/cattle/ubuntu1804-docker-v1-8c-8g.cfg
+++ b/jenkins-config/clouds/openstack/cattle/ubuntu1804-docker-v1-8c-8g.cfg
@@ -1,3 +1,4 @@
 IMAGE_NAME=ZZCI - Ubuntu 18.04 - docker - x86_64 - 20200720-202227.181
 LABELS=ubuntu1804-docker-v1-8c-8g
 HARDWARE_ID=v1-standard-8
+VOLUME_SIZE=20