rebase roles to latest upstream
    
    rebase roles to latest upstream
      Resolves: rhbz#1957876
    make postfix role idempotent
      Resolves: rhbz#1960375
    use FQRN in postfix README
      Resolves: rhbz#1958963
    use relayhost in postfix README
      Resolves: rhbz#1866544
    use lazy unmount to fix umount: target is busy
      Resolves: rhbz#1945359
    network - Add support for ETHTOOL Ring option
      Resolves: rhbz#1959649
    storage: calltrace observed when set type: partition for storage_pools
      Resolves: rhbz#1854187
    ha_cluster - cannot read preshared key in binary format
      Resolves: rhbz#1952620