Bugfix/207 exceptions

[x4v13r64]

Fix for #207.

I've moved back the profile list argument parsing to the __main__.py file and removed it from the provider.py. Maybe there would be a way to ensure in ArgParse that there's only 1 parameter, so that the arg isn't a list?

[codecov-io]

Codecov Report

Merging #209 into develop will increase coverage by 0.23%.
The diff coverage is 66.66%.

@@             Coverage Diff             @@
##           develop     #209      +/-   ##
===========================================
+ Coverage     29.7%   29.94%   +0.23%     
===========================================
  Files           74       74              
  Lines         5430     5430              
===========================================
+ Hits          1613     1626      +13     
+ Misses        3817     3804      -13

Impacted Files	Coverage Δ
ScoutSuite/__main__.py	67.03% <100%> (ø)	⬆️
ScoutSuite/providers/aws/provider.py	10.31% <33.33%> (ø)	⬆️
ScoutSuite/core/exceptions.py	50% <0%> (+4.54%)	⬆️
ScoutSuite/output/js.py	37.5% <0%> (+9.37%)	⬆️
ScoutSuite/output/utils.py	39.47% <0%> (+15.78%)	⬆️

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[Aboisier]

Looks good!