Revert Commits That Disable Pytorch Tests For 1.7

[NihalHarish]

Description of changes:

• Reverts two commits that had disabled Pytorch 1.7 ZCC tests

Style and formatting:

I have run pre-commit install to ensure that auto-formatting happens with every commit.

Issue number, if available

By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.

[codecov-io]

Codecov Report

Merging #390 (071b05d) into master (7c5c8c4) will decrease coverage by 1.38%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #390      +/-   ##
==========================================
- Coverage   66.25%   64.87%   -1.39%     
==========================================
  Files         173      163      -10     
  Lines       13275    12929     -346     
==========================================
- Hits         8796     8388     -408     
- Misses       4479     4541      +62     

Impacted Files	Coverage Δ
smdebug/tensorflow/utils.py	63.03% <0.00%> (-23.23%)	⬇️
smdebug/tensorflow/callable_cache.py	60.86% <0.00%> (-21.74%)	⬇️
smdebug/tensorflow/singleton_utils.py	83.33% <0.00%> (-16.67%)	⬇️
smdebug/tensorflow/collection.py	84.53% <0.00%> (-11.35%)	⬇️
smdebug/tensorflow/keras.py	78.43% <0.00%> (-10.86%)	⬇️
smdebug/tensorflow/base_hook.py	74.63% <0.00%> (-3.68%)	⬇️
smdebug/tensorflow/session.py	88.46% <0.00%> (-3.37%)	⬇️
smdebug/core/collection_manager.py	90.24% <0.00%> (-2.44%)	⬇️
smdebug/core/collection.py	87.38% <0.00%> (-1.81%)	⬇️
smdebug/tensorflow/tensor_ref.py	87.09% <0.00%> (-1.62%)	⬇️
... and 14 more

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[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 66.25%. Comparing base (7c5c8c4) to head (071b05d).
⚠️ Report is 118 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #390      +/-   ##
==========================================
- Coverage   66.25%   66.25%   -0.01%     
==========================================
  Files         173      163      -10     
  Lines       13275    12929     -346     
==========================================
- Hits         8796     8566     -230     
+ Misses       4479     4363     -116     

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