lpupdate.py should check if the team_owner is a person (not a team)

[Ronnie]

The script /teams/management/commands/lpupdate.py checks for a changed team_owner on launchpad, but it does not check if the owner is again a team.

If the owner is a team, then the team_owner should be the owner of the owner_team (loco_team.team_owner.team_owner)
All the members of the owner_teams should become team admins in LD

the "is_admin_or_owner" check in launchpad.py will than be unneccairy because it checks for "team.admin_profiles.filter(user__username=username):". This will increase the page speed for some pages in some special cases. And will also remove inconsistency, because this is the only function that do calls to launchpadlib on a page request. The other calls to launchpadlib are all scheduled tasks