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/cloud.cfg b/jenkins-config/clouds/openstack/cattle/cloud.cfg
index 2b0ca12..212be72 100644
--- a/jenkins-config/clouds/openstack/cattle/cloud.cfg
+++ b/jenkins-config/clouds/openstack/cattle/cloud.cfg
@@ -6,6 +6,7 @@
 
 # Default Template Configuration
 IMAGE_NAME=ZZCI - CentOS 7 - builder - 20180601-1002
+VOLUME_SIZE=20
 HARDWARE_ID=v1-standard-1
 NETWORK_ID=bd089be9-e846-4afe-905b-8bb6c7c90faf
 USER_DATA_ID=jenkins-init-script