Secure AJP connector between Dogtag and Apache proxy
    
    AJP implementation in Tomcat is vulnerable to CVE-2020-1938 if used
    without shared secret. Set up a shared secret between localhost
    connector and Apache mod_proxy_ajp pass-through.
    
    For existing secured AJP pass-through make sure the option used for
    configuration on the tomcat side is up to date. Tomcat 9.0.31.0
    deprecated 'requiredSecret' option name in favor of 'secret'. Details
    can be found at https://tomcat.apache.org/migration-9.html#Upgrading_9.0.x
    
    Fixes: https://pagure.io/freeipa/issue/8221
    
    Signed-off-by: Alexander Bokovoy <abokovoy@redhat.com>
    Reviewed-By: Florence Blanc-Renaud <flo@redhat.com>
    Reviewed-By: Christian Heimes <cheimes@redhat.com>
    Reviewed-By: Rob Crittenden <rcritten@redhat.com>