use parentUpdated instead of parentInstalled to allow branch switches to take place if they are a part of an update.  Also relax the check for whether a branch switch can take place as part of an update to allow other versions on the  same branch.
use parentUpdated instead of parentInstalled to allow branch switches to take place if they are a part of an update.  Also relax the check for whether a branch switch can take place as part of an update to allow other versions on the 
same branch.


fedora-conary/conary,fedora-conary/conary,fedora-conary/conary,fedora-conary/conary,fedora-conary/conary