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-arm64-4c-4g.cfg b/jenkins-config/clouds/openstack/cattle/ubuntu1804-docker-arm64-4c-4g.cfg
index 5ece275..90de5db 100644
--- a/jenkins-config/clouds/openstack/cattle/ubuntu1804-docker-arm64-4c-4g.cfg
+++ b/jenkins-config/clouds/openstack/cattle/ubuntu1804-docker-arm64-4c-4g.cfg
@@ -1,3 +1,4 @@
 IMAGE_NAME=ZZCI - Ubuntu 18.04 - docker - arm64 - 20200313-023920.944
 LABELS=ubuntu1804-docker-arm64-4c-4g
 HARDWARE_ID=lf-standard-4
+VOLUME_SIZE=20