use firewall, selinux, certificate roles in other system roles
    
    cockpit - [RFE] convert cockpit role to use firewall, selinux role, and certificate role
    Resolves:rhbz#2137663
    
    logging - [RFE] convert logging role to use firewall, selinux role, and certificate role
    Resolves:rhbz#2130357
    
    metrics - [RFE] convert metrics role to use firewall and selinux role
    Resolves:rhbz#2133528
    
    nbde_server - [RFE] convert nbde_server role to use firewall and selinux role
    Resolves:rhbz#2133930
    
    postfix - [RFE] convert postfix role to use firewall and selinux role
    Resolves:rhbz#2130329
    
    vpn - Add parameters shared_key_content, ike, esp, type, leftid, rightid
    Resolves:rhbz#2119102
    
    vpn - [RFE] convert vpn role to use firewall and selinux role
    Resolves:rhbz#2130344