set firewalld default zone fails when default_zone not set

[goniomdq]

set firewalld default zone fails when default_zone not set because of the conditional: when: defaultzone.stdout != default_zone

I suggest removing the conditional altogether, as well as task "get actual firewalld default zone", since removing these would produce the same effect:

1. If default zone isn't 'public' it would be changed to public;
2. If default zone is 'public', it won't do anything.

[FlatKey]

@goniomdq Thank you for this issue,I'll check and fix it.