This commit adds the rsyslog_server role which will provide a system
which all logs will be agregeated. This change is part 2 of 3 to update
all of the logging bits within the stack such that they're made more
generic and community consumable.
Roles added:
* rsyslog_server
Plays added:
* rsyslog-install.yml
Plays modified:
* setup-infrastructure.yml
DocImpact
Implements: blueprint rsyslog-update
Change-Id: I7627e362a7ee3b560dc02a1beda2034998216451
321a32ee15