Decouple DataModules from Models - SemSegment

[akihironitta]

What does this PR do?

This PR is a follow up of #206 and fixes #207.

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[codecov]

Codecov Report

Merging #332 (eff9150) into master (f00e85d) will increase coverage by 0.07%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##           master     #332      +/-   ##
==========================================
+ Coverage   82.32%   82.40%   +0.07%     
==========================================
  Files         100      100              
  Lines        5602     5620      +18     
==========================================
+ Hits         4612     4631      +19     
+ Misses        990      989       -1     

Flag	Coverage Δ
cpu	24.76% <0.00%> (+<0.01%)	⬆️
pytest	24.76% <0.00%> (+<0.01%)	⬆️
unittests	81.65% <0.00%> (+0.07%)	⬆️

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

Impacted Files	Coverage Δ
pl_bolts/models/vision/segmentation.py	62.74% <0.00%> (-2.64%)	⬇️
pl_bolts/utils/arguments.py	96.15% <0.00%> (+0.04%)	⬆️
.../models/autoencoders/basic_vae/basic_vae_module.py	91.66% <0.00%> (+0.08%)	⬆️
pl_bolts/losses/self_supervised_learning.py	77.70% <0.00%> (+0.14%)	⬆️
...ts/models/autoencoders/basic_ae/basic_ae_module.py	88.00% <0.00%> (+0.16%)	⬆️
pl_bolts/models/rl/common/gym_wrappers.py	89.91% <0.00%> (+0.26%)	⬆️
pl_bolts/datasets/imagenet_dataset.py	18.45% <0.00%> (+0.38%)	⬆️
pl_bolts/optimizers/lars_scheduling.py	95.74% <0.00%> (+0.39%)	⬆️
..._bolts/models/self_supervised/moco/moco2_module.py	79.23% <0.00%> (+0.49%)	⬆️
pl_bolts/datasets/ssl_amdim_datasets.py	75.00% <0.00%> (+1.08%)	⬆️
... and 1 more

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[Borda]

lgtm

[Borda]

@akihironitta seems that some tests are not passing, mind have a look... :]

[akihironitta]

@Borda Thanks for the fix in #343. It seems to have passed the tests.