Update git submodules

* Update docs/submodules/oom/offline-installer.git from branch 'master'
  to d8c6d9acfd8b74dc3f3187d069b393405e5c1b18
  - Archive helm_charts with command module
    
    Due to bug in ansible archive module empty files are not added into tar file.
    Hence kibana-onborading.json missing in helm_charts on infra node.
    Changing archive module into command module to tar helm_charts.
    
    Issue-ID: OOM-2231
    Signed-off-by: Ondřej Šmalec <o.smalec@partner.samsung.com>
    Change-Id: I5527bd0f52976a93ac2861d9de010fbb79eb97fd
    
1 file changed