644 make host variables more customizable
To be merged together with https://gitlab.com/xivo.solutions/xivocc-installer/merge_requests/11
Closes #644
Edited by username-removed-735671
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
To be merged together with https://gitlab.com/xivo.solutions/xivocc-installer/merge_requests/11
Closes #644