Description of problem:
When using EQLX with triple, eqlx_pool= will always be null in /etc/cinder/cinder.conf because the template is using :

openstack-tripleo-heat-templates/puppet/manifests/overcloud_controller.pp:      eqlx_pool           => hiera('cinder::backend::eqlx::eqlx_lpool', undef),
openstack-tripleo-heat-templates/puppet/manifests/overcloud_controller_pacemaker.pp:      eqlx_pool           => hiera('cinder::backend::eqlx::eqlx_lpool', undef),


instead of 
openstack-tripleo-heat-templates/puppet/manifests/overcloud_controller.pp:      eqlx_pool           => hiera('cinder::backend::eqlx::eqlx_pool', undef),
openstack-tripleo-heat-templates/puppet/manifests/overcloud_controller_pacemaker.pp:      eqlx_pool           => hiera('cinder::backend::eqlx::eqlx_pool', undef),





[root@overcloud-controller-0 hieradata]# cat cinder_eqlx_data.yaml

cinder::backend::eqlx::eqlx_chap_login:
cinder::backend::eqlx::eqlx_chap_password:
cinder::backend::eqlx::eqlx_group_name: my_group_name
cinder::backend::eqlx::eqlx_pool: default
cinder::backend::eqlx::eqlx_use_chap: false
cinder::backend::eqlx::san_ip: 10.0.0.0
cinder::backend::eqlx::san_login: username
cinder::backend::eqlx::san_password: password
cinder::backend::eqlx::san_thin_provision: true
cinder::backend::eqlx::volume_backend_name: tripleo_eqlx
cinder_enable_eqlx_backend: true




[root@overcloud-controller-0 cinder]# cat cinder.conf | grep eqlx_pool
#eqlx_pool=default
eqlx_pool=

Version-Release number of selected component (if applicable):


How reproducible:
Always

Steps to Reproduce:
1.  Include cinder-eqlx-config.yaml when deploying overcloud
2.
3.

Actual results:
eqlx_pool is empty


Expected results:
default value

Additional info: