Index ipakrbprincipalalias and ipaautomountkey attributes
    
    An unindexed search for ipakrbprincipalalias is fired for every ipa
    command (and other authentication events) which would degrade IPA
    server performance if not indexed. ipaautomountkey unindexed searches
    are hit when new key entries are being added.
    
    Add both indexes to new and updated IPA installs.
    
    https://fedorahosted.org/freeipa/ticket/3020
    https://fedorahosted.org/freeipa/ticket/3025