Use dogtag-ipa-ca-renew-agent to track certificates on master CA.
    
    Before, dogtag-ipa-renew-agent was used to track the certificates and the
    certificates were stored to LDAP in renew_ca_cert and renew_ra_cert. Since
    dogtag-ipa-ca-renew-agent can store the certificates itself, the storage code
    was removed from renew_ca_cert and renew_ra_cert.
    
    Reviewed-By: Petr Viktorin <pviktori@redhat.com>