Reduce disk storage consumption in Openstack e2e tests (#798)

Author: irozzo-1A

test/e2e/provisioning/testdata/machinedeployment-openstack-upgrade.yml

@@ -34,6 +34,7 @@ spec:
             domainName: "<< DOMAIN_NAME >>"
             region: "<< REGION >>"
             network: "<< NETWORK_NAME >>"
+            rootDiskSizeGB: 10
             rhsmOfflineToken: "<< REDHAT_SUBSCRIPTIONS_OFFLINE_TOKEN >>"
           operatingSystem: "<< OS_NAME >>"
           operatingSystemSpec:

test/e2e/provisioning/testdata/machinedeployment-openstack.yaml

@@ -34,7 +34,6 @@ spec:
             domainName: "<< DOMAIN_NAME >>"
             region: "<< REGION >>"
             network: "<< NETWORK_NAME >>"
-            rootDiskSizeGB: 20
           operatingSystem: "<< OS_NAME >>"
           operatingSystemSpec:
             distUpgradeOnBoot: false