Fix imports in datamodules

[Borda]

What does this PR do?

Fixes
>>> from pl_bolts.datamodules import STL10DataModule

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[pep8speaks]

Hello @Borda! Thanks for updating this PR.

There are currently no PEP 8 issues detected in this Pull Request. Cheers! 🍻

Comment last updated at 2020-10-23 15:00:52 UTC

[codecov]

Codecov Report

Merging #303 into master will decrease coverage by 0.07%.
The diff coverage is 73.46%.

@@            Coverage Diff             @@
##           master     #303      +/-   ##
==========================================
- Coverage   81.95%   81.87%   -0.08%     
==========================================
  Files          99       99              
  Lines        5503     5534      +31     
==========================================
+ Hits         4510     4531      +21     
- Misses        993     1003      +10     

Flag	Coverage Δ
#cpu	24.31% <57.14%> (+0.84%)	⬆️
#pytest	24.31% <57.14%> (+0.84%)	⬆️
#unittests	81.26% <63.26%> (-0.15%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
pl_bolts/datasets/imagenet_dataset.py	18.45% <12.50%> (-1.67%)	⬇️
pl_bolts/datamodules/__init__.py	88.00% <82.85%> (-12.00%)	⬇️
pl_bolts/datasets/__init__.py	100.00% <100.00%> (ø)
pl_bolts/datasets/ssl_amdim_datasets.py	75.00% <100.00%> (-1.32%)	⬇️
pl_bolts/models/__init__.py	100.00% <100.00%> (ø)
pl_bolts/models/vision/__init__.py	100.00% <100.00%> (ø)
pl_bolts/models/vision/segmentation.py	65.38% <100.00%> (ø)
...l_bolts/models/self_supervised/swav/swav_module.py	73.50% <0.00%> (-0.86%)	⬇️

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