reviewed by jpeacock fixes ZEN-7036 add option for the event severity icons, store what we need in the index for updating the count without uncompressing the protobuf

git-svn-id: http://dev.zenoss.com/svnint/trunk/core/zep@74696 f5df01ce-0320-0410-9ed9-ddcd13c732cc
Merge branch 'master' of github.com:zenoss/zenoss-zep