Fix si-tests helm cmd and voltype customize

  Related-PROD: PROD-36856

Change-Id: Ie9cec8768eac913c168224321db82a27310b7117
diff --git a/k8s/workspace/update-openstack-resources.sh b/k8s/workspace/update-openstack-resources.sh
index e7543b1..23f9c21 100644
--- a/k8s/workspace/update-openstack-resources.sh
+++ b/k8s/workspace/update-openstack-resources.sh
@@ -44,6 +44,8 @@
 sed -i "s/public_net_uuid/${netid}/g" $MY_PROJFOLDER/yamls/tempest_custom.yaml
 echo "# s/public_net_name/ -> ${TEMPEST_CUSTOM_PUBLIC_NET}"
 sed -i "s/public_net_name/${TEMPEST_CUSTOM_PUBLIC_NET}/g" $MY_PROJFOLDER/yamls/tempest_custom.yaml
+echo "# s/volume_type_name/ -> ${TEMPEST_CUSTOM_VOLUME_TYPE}"
+sed -i "s/volume_type_name/${TEMPEST_CUSTOM_VOLUME_TYPE}/g" $MY_PROJFOLDER/yamls/tempest_custom.yaml
 echo " "
 
 echo "# Updating SPT global_config.yaml"