Fix warning "The loop variable 'item' is already in use"

[daurnimator]

In current ansible output in a few places:

    docker:  [WARNING]: The loop variable 'item' is already in use. You should set the
    docker: `loop_var` value in the `loop_control` option for the task to something else to
    docker: avoid variable collisions and unexpected behavior.

[sjas]

this should point in the proper direction: https://wrightturn.wordpress.com/2017/05/10/ansible-warning-the-loop-variable-item-is-already-in-use/