disallow removing system user, also move creating the user to before zenoss starts-a
disallow removing the zenoss_system user, move to init pre so that we add the values to global conf before we start up
Merge pull request #70 from zenoss/systemuser

create a new systemuser when installing or upgrading zenoss disallow them to be deleted
changed zooming to work how it used to
introduced default downsampling to ease things when we start zooming out
use the default if we are unable to parse the ceiling from the format
Merge pull request #72 from zenoss/ZEN-8852

If we are unable to parse the ceiling for a graph then use the default
Merge pull request #71 from zenoss/feature/zoomfix

update zooming to work like it previously did in 4.x
reference zenhome and add system account to upgrade
Merge pull request #73 from zenoss/develop

Develop