Update for OpenXAL 2.x.x
See https://jira.esss.lu.se/browse/INFRA-1144
I also introduced the openxal_installations_to_keep variable to keep 2 versions of OpenXAL by default (as in the phoebus role). This applies only for the /opt/openxal-x.x.x
directory (openxal.dist version).
All apps are installed as separate jar under {{ openxal_home }}/apps
. When updating an app, I just overwrite the jar file. I don't think they want to see several versions of the same app in the LCR. Or?