Print results in console

[emanuelefricano93]

Hello,

I have run this script inside a pod to collect information about redis in productioncluster, where for security reason at the end of the script was not possible to save the file with all the information.
So it was useful for me to have the results printed in console.
I have done this PR, so maybe with the option -po or --print-only someone else can achieve the same results without the need to create a file.

Here the PR:
#28