Description of problem:
The deployment of the overcloud failed with the following errors:

fatal: [ceph-1]: FAILED! => {"msg": "The task includes an option with an undefined variable. The error was: 'dict object' has no attribute 'stdout
re/ansible/roles/tripleo-ipsec/tasks/init-connections.yml': line 20, column 5, but may\nbe elsewhere in the file depending on the exact syntax problem.\n\nThe offending line appears to be:\n\
re\n"}
2018-12-12 15:35:23,990 p=73331 u=mistral |  fatal: [ceph-0]: FAILED! => {"msg": "The task includes an option with an undefined variable. The error was: 'dict object' has no attribute 'stdout
re/ansible/roles/tripleo-ipsec/tasks/init-connections.yml': line 20, column 5, but may\nbe elsewhere in the file depending on the exact syntax problem.\n\nThe offending line appears to be:\n\
re\n"}
2018-12-12 15:35:24,021 p=73331 u=mistral |  fatal: [ceph-2]: FAILED! => {"msg": "The task includes an option with an undefined variable. The error was: 'dict object' has no attribute 'stdout
re/ansible/roles/tripleo-ipsec/tasks/init-connections.yml': line 20, column 5, but may\nbe elsewhere in the file depending on the exact syntax problem.\n\nThe offending line appears to be:\n\
re\n"}

The deployment command is:
openstack overcloud deploy \
--timeout 100 \
--templates /usr/share/openstack-tripleo-heat-templates \
--stack overcloud \
--libvirt-type kvm \
--ntp-server clock.redhat.com \
-e /home/stack/virt/internal.yaml \
-e /usr/share/openstack-tripleo-heat-templates/environments/network-isolation.yaml \
-e /home/stack/virt/network/network-environment.yaml \
-e /usr/share/openstack-tripleo-heat-templates/environments/ipsec.yaml \
-e /home/stack/virt/inject-trust-anchor.yaml \
-e /home/stack/virt/hostnames.yml \
-e /usr/share/openstack-tripleo-heat-templates/environments/ceph-ansible/ceph-ansible.yaml \
-e /home/stack/virt/debug.yaml \
-e /home/stack/virt/nodes_data.yaml \
--environment-file /usr/share/openstack-tripleo-heat-templates/environments/cinder-backup.yaml \
-e ~/containers-prepare-parameter.yaml \
-e /home/stack/virt/ceph-osd-encryption.yaml

The topology is 3 controller, 2 compute, 3 Ceph storage

Version-Release number of selected component (if applicable):
ansible-tripleo-ipsec-9.0.1-0.20181012162415.8b37e93.el7ost.noarch

How reproducible:
100%

Steps to Reproduce:
1. Deploy an environment with the /usr/share/openstack-tripleo-heat-templates/environments/ipsec.yaml environment file and Ceph storage nodes

Actual results:
The deployment fails in the IPsec first stage

Expected results:
The deployment is successful and IPsec is set on all of the overcloud nodes

Additional info: