Disable warnings for zypper commands unsupported in zypper module

[dmarcoux]

Closes #24

Sources about the changes:

• https://ansibledaily.com/avoid-ansible-command-warnings/
• http://www.freekb.net/Article?id=2384

[dmarcoux]

I have done a deployment with the changes included in this PR and the warnings didn't appear, so it's working as expected.