iaas: be more verbose when logging step infos

when deleting several VM the log was describing all operation one
after another without showing which VM concerned.
I thought it was a good this to add such info.
I expanded it to all `echo` for the IAAS module.

Reviewed-by: sayoun <sayoun@gandi.net>
Signed-off-by: William Dauchy <william@gandi.net>
cli: cleaning trailing whitespaces

Signed-off-by: William Dauchy <william@gandi.net>
Sync branches