[WiP] SageMaker: Part 1

[jamesmcclain]

Overview

Brief description of what this PR does, and why it is needed.

Checklist

• Added needs-backport label if PR is bug fix that applies to previous minor release
• Ran scripts/format_code and committed any changes
• Documentation updated if needed
• PR has a name that won't get you publicly shamed for vagueness

Notes

Optional. Ancillary topics, caveats, alternative strategies that didn't work out, anything else.

Testing Instructions

• How to test this PR
• Prefer bulleted description
• Start after checking out this branch
• Include any setup required, such as rebuilding the Docker image.
• Include test case, and expected output if not captured by automated tests.

Closes #XXX

[codecov]

Codecov Report

Merging #1871 (1740e56) into master (30fd26f) will decrease coverage by 0.36%.
The diff coverage is 33.82%.

@@            Coverage Diff             @@
##           master    #1871      +/-   ##
==========================================
- Coverage   82.49%   82.13%   -0.36%     
==========================================
  Files         190      192       +2     
  Lines        9316     9384      +68     
==========================================
+ Hits         7685     7708      +23     
- Misses       1631     1676      +45     

Files Changed	Coverage Δ
...gemaker/rastervision/sagemaker/sagemaker_runner.py	25.00% <25.00%> (ø)
...ision_sagemaker/rastervision/sagemaker/__init__.py	100.00% <100.00%> (ø)

[AdeelH]

Superseded by #1968