At undercloud upgrade validations Message: Minimum required for /: 25G - volume free space: 25.6

[Quique Llorente]

After we do a undercloud upgrade, we do an undercloud re-install and it fails about with disk space issues
http://logs.openstack.org/74/590774/9/check/tripleo-ci-centos-7-undercloud-upgrades/96f18d3/logs/undercloud/home/zuul/undercloud_reinstall.log.txt.gz
2018-09-18 13:11:23 | + openstack undercloud install
2018-09-18 13:11:26 | Deprecated: Option "ipxe_deploy" from group "DEFAULT" is deprecated. Use option "ipxe_enabled" from group "DEFAULT".
2018-09-18 13:11:26 | Deprecated: Option "inspection_iprange" from group "DEFAULT" is deprecated. Use option "inspection_iprange" from group "ctlplane-subnet".
2018-09-18 13:11:26 | Deprecated: Option "network_cidr" from group "DEFAULT" is deprecated. Use option "cidr" from group "ctlplane-subnet".
2018-09-18 13:11:26 | Deprecated: Option "network_gateway" from group "DEFAULT" is deprecated. Use option "gateway" from group "ctlplane-subnet".
2018-09-18 13:11:26 | Deprecated: Option "dhcp_start" from group "DEFAULT" is deprecated. Use option "dhcp_start" from group "ctlplane-subnet".
2018-09-18 13:11:26 | Deprecated: Option "dhcp_end" from group "DEFAULT" is deprecated. Use option "dhcp_end" from group "ctlplane-subnet".
2018-09-18 13:11:37 | An error occurred during configuration validation, please check your host configuration and try again. Error message: Task 'loop on existing volumes, check available space' failed:
2018-09-18 13:11:37 | Host: undercloud
2018-09-18 13:11:37 | Message: Minimum required for /: 25G - volume free space: 25.6
2018-09-18 13:11:37 |
2018-09-18 13:11:37 | Failure! The validation failed for all hosts:
2018-09-18 13:11:37 | * undercloud
2018-09-18 13:11:37 |

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/603625

[OpenStack Infra (hudson-openstack)]

Change abandoned by Jose Luis Franco (<email address hidden>) on branch: master
Review: https://review.openstack.org/603625
Reason: Fixed in : https://review.openstack.org/#/c/603523/