Description of problem:

Suppose below is the structure of the yaml file and now we need to pass variables hostname and iburst. 

-------------------------------------------------------------
- hosts: all
  vars:
    timesync_ntp_servers:
     - hostname: 192.168.123.10
       iburst: yes
     - hostname: 192.168.123.20
       iburst: yes
    timesync_ntp_provider: chrony
    timesync_step_threshold: 1.0
    timesync_dhcp_ntp_servers: no
  roles:
    - linux-system-roles.timesync
-------------------------------------------------------------

Because of the following bug we cannot provide value to global parameter like - "[  { 'hostname': '10.10.10.10', 'iburst': 'yes' }, { 'hostname': '20.20.20.20', 'iburst': 'yes' }]"

https://bugzilla.redhat.com/show_bug.cgi?id=1402136


Version-Release number of selected component (if applicable):
Red Hat Satellite 6.4

Steps to Reproduce:
1. yum install  rhel-system-roles 
2. Import timesync role in satellite
3. try to set variables. 

Actual results:
Unable to pass "[  { 'hostname': '10.10.10.10', 'iburst': 'yes' }, { 'hostname': '20.20.20.20', 'iburst': 'yes' }]" in global/host parameter.

Expected results:

This functionality is present in upstream foreman. 

https://www.theforeman.org/plugins/foreman_ansible/2.x/index.html#4.1.2ImportingVariables