Bugfix/elb policies revival

[misg]

This PR aims to bring back elb policies to life, as part of #298.
Although, I didn't manage to really test it (I tested it against our aws test account, with a load balancer set up but I didn't find a way for adding a name to my elb policy (which is not retrieved in the end for that reason)).
Could you take a look, @j4v ?

[x4v13r64]

@misg I think all you where missing was an HTTPS listener. I've configured one so you should now get results.

[misg]

Oh indeed, nice catch! I had a bug although, I just fixed it. I'm able to retrieve elb policies now, their names are correctly displayed in Scout Suite reports. But the fields Protocols, Options and Ciphers are empty, not sure if it's expected or not (regarding the elb policy I use for testing), there could be some issue in the parsing/displaying.

[codecov-io]

Codecov Report

Merging #358 into develop will decrease coverage by 0.15%.
The diff coverage is 20.51%.

@@             Coverage Diff             @@
##           develop     #358      +/-   ##
===========================================
- Coverage    34.67%   34.52%   -0.16%     
===========================================
  Files          187      188       +1     
  Lines         6166     6234      +68     
===========================================
+ Hits          2138     2152      +14     
- Misses        4028     4082      +54

Impacted Files	Coverage Δ
ScoutSuite/providers/base/services.py	25.71% <0%> (-1.56%)	⬇️
...uite/providers/aws/resources/elb/load_balancers.py	28.57% <0%> (ø)	⬆️
ScoutSuite/providers/base/configs/browser.py	52.3% <100%> (ø)	⬆️
ScoutSuite/providers/aws/resources/elb/base.py	87.5% <100%> (+1.78%)	⬆️
ScoutSuite/providers/aws/facade/elb.py	32.65% <20.83%> (-13.51%)	⬇️
ScoutSuite/providers/aws/resources/elb/policies.py	43.75% <43.75%> (ø)
ScoutSuite/providers/aws/provider.py	9.14% <6.45%> (-0.08%)	⬇️

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[x4v13r64]

@misg this should now be fixed, there was a minor bug in bringing back Scout2 code.