Description of problem:
Container Guide:https://access.qa.redhat.com/documentation/en-us/red_hat_ceph_storage/3/html-single/container_guide/#installing-the-ceph-iscsi-gateway-in-a-container-container
Chapter 1
section 6
"Important" section mentioning gateway_ip_list is not supported for container based deployment,but it is failing with the error mentioned below.

Just add note that gateway_ip_list should be mentioned in iscsigws.yml for copying the packages required for iscsi.

TASK [ceph-iscsi-gw : make sure gateway_ip_list is configured] ****************************************************************************************************************************************************
Monday 19 November 2018  11:19:21 +0000 (0:00:00.315)       0:09:01.571 ******* 
fatal: [magna066]: FAILED! => {"changed": false, "msg": "you must set a list of IPs (comma separated) for gateway_ip_list"}
fatal: [magna087]: FAILED! => {"changed": false, "msg": "you must set a list of IPs (comma separated) for gateway_ip_list"}


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


How reproducible:


Steps to Reproduce:
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Actual results:


Expected results:
Playbook should work fine without any errors


Additional info: