[REF] DNS

[YannickB]

• Change module into clouder_template_dns

• Add support for libcloud DNS (untested yet)

Annnnd I'd like to say debug bind, but no it's not working yet... It's starting to be a problem and a priority I need help, I don't understand were the problem is coming (even an nslookup from inside the bind container is not working). The cause seems to be the move to alpine. I need a bind guru to look at it, and if possible review the entire configuration because I'm pretty sure it's insecure, I am really bad with DNS.

Still, I suggest to merge this PR for the design improvement and debug bind on another one

[codecov-io]

Current coverage is 31.12% (diff: 18.68%)

Merging #175 into master will decrease coverage by 0.05%

@@             master       #175   diff @@
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  Files            72         73     +1   
  Lines          5609       5654    +45   
  Methods           0          0          
  Messages          0          0          
  Branches          0          0          
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+ Hits           1749       1760    +11   
- Misses         3860       3894    +34   
  Partials          0          0          

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[YannickB]

@lasley I'll need your help here I think, I need to merge this PR and another one before I can continue

[lasley]

Ooops I missed this, will review today