update asg

[ibejohn818]

update tests

[codecov-io]

Codecov Report

Merging #10 into master will increase coverage by 0.64%.
The diff coverage is 41.66%.

@@            Coverage Diff             @@
##           master      #10      +/-   ##
==========================================
+ Coverage   38.27%   38.92%   +0.64%     
==========================================
  Files          19       19              
  Lines        1254     1264      +10     
==========================================
+ Hits          480      492      +12     
+ Misses        774      772       -2

Impacted Files	Coverage Δ
stackformation/aws/ami.py	0% <0%> (ø)	⬆️
stackformation/aws/stacks/asg.py	0% <0%> (ø)	⬆️
stackformation/aws/user_data.py	66.66% <100%> (ø)	⬆️
stackformation/aws/__init__.py	39.13% <40%> (+0.24%)	⬆️
stackformation/aws/stacks/__init__.py	36.79% <75%> (+0.15%)	⬆️
stackformation/aws/stacks/eip.py	100% <0%> (+29.41%)	⬆️

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