update sdk for new re:invent 2018 features

[jesterhazy]

Description of changes:

update sdk for new re:invent 2018 features

Merge Checklist

Put an x in the boxes that apply. You can also fill these out after creating the PR. If you're unsure about any of them, don't hesitate to ask. We're here to help! This is simply a reminder of what we are going to look for before merging your pull request.

• I have read the CONTRIBUTING doc
• I have added tests that prove my fix is effective or that my feature works (if appropriate)
• I have updated the changelog with a description of my changes (if appropriate)
• I have updated any necessary documentation (if appropriate)

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[codecov-io]

Codecov Report

Merging #513 into master will decrease coverage by 1.55%.
The diff coverage is 84.89%.

@@            Coverage Diff            @@
##           master    #513      +/-   ##
=========================================
- Coverage   94.26%   92.7%   -1.56%     
=========================================
  Files          59      71      +12     
  Lines        4623    5336     +713     
=========================================
+ Hits         4358    4947     +589     
- Misses        265     389     +124

Impacted Files	Coverage Δ
src/sagemaker/amazon/amazon_estimator.py	87.68% <0%> (-1.29%)	⬇️
src/sagemaker/fw_utils.py	100% <100%> (ø)	⬆️
src/sagemaker/chainer/model.py	96.42% <100%> (ø)	⬆️
src/sagemaker/tensorflow/serving.py	98.33% <100%> (ø)	⬆️
src/sagemaker/sparkml/__init__.py	100% <100%> (ø)
src/sagemaker/local/entities.py	95.29% <100%> (+0.06%)	⬆️
src/sagemaker/__init__.py	100% <100%> (ø)	⬆️
src/sagemaker/sklearn/defaults.py	100% <100%> (ø)
src/sagemaker/fw_registry.py	100% <100%> (ø)
src/sagemaker/sklearn/__init__.py	100% <100%> (ø)
... and 28 more

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