pki-proxy: Don't rely on running apache until it's configured
    
    This partially restores the pre-ec73de969f state of `http_proxy`,
    which fails to restart the apache service during master
    installation. The failure happens because of apache is not
    configured yet on 'pki-tomcatd' installation phase. The mentioned
    code and proposed one relies on the installer which bootstraps the
    master.
    
    Fixes: https://pagure.io/freeipa/issue/8233
    Signed-off-by: Stanislav Levin <slev@altlinux.org>
    Reviewed-By: Alexander Bokovoy <abokovoy@redhat.com>