Debug ssh

[YannickB]

• Username argument in ssh connect wasn't working

• SSH Execute wasn't returning output

• Service.childs is a dictionary, mapped wasn't an existing method

[codecov-io]

Current coverage is 31.15% (diff: 20.00%)

Merging #170 into master will decrease coverage by <.01%

@@             master       #170   diff @@
==========================================
  Files            72         72          
  Lines          5609       5610     +1   
  Methods           0          0          
  Messages          0          0          
  Branches          0          0          
==========================================
  Hits           1748       1748          
- Misses         3861       3862     +1   
  Partials          0          0          

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