[Fix] Enable the test cases

[sxjscience]

Description

Try to fix https://github.com/dmlc/gluon-nlp/issues/1434

Checklist

Essentials

• [ ] PR's title starts with a category (e.g. [BUGFIX], [MODEL], [TUTORIAL], [FEATURE], [DOC], etc)
• [ ] Changes are complete (i.e. I finished coding on this PR)
• [ ] All changes have test coverage
• [ ] Code is well-documented

Changes

• [ ] Feature1, tests, (and when applicable, API doc)
• [ ] Feature2, tests, (and when applicable, API doc)

Comments

• If this change is a backward incompatible change, why must this change be made.
• Interesting edge cases to note here

cc @dmlc/gluon-nlp-team

[github-actions[bot]]

The documentation website for preview: http://gluon-nlp-staging.s3-accelerate.dualstack.amazonaws.com/PR1435/try_reenable_test/index.html

[codecov[bot]]

Codecov Report

Merging #1435 (3a54f78) into master (552d7e8) will increase coverage by 0.14%. The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #1435      +/-   ##
==========================================
+ Coverage   85.31%   85.45%   +0.14%     
==========================================
  Files          53       53              
  Lines        6987     6987              
==========================================
+ Hits         5961     5971      +10     
+ Misses       1026     1016      -10     

Impacted Files	Coverage Δ
src/gluonnlp/data/loading.py	81.13% <0.00%> (-2.27%)	:arrow_down:
src/gluonnlp/data/tokenizers/subword_nmt.py	78.50% <0.00%> (-0.94%)	:arrow_down:
src/gluonnlp/data/tokenizers/yttm.py	81.89% <0.00%> (-0.87%)	:arrow_down:
src/gluonnlp/utils/parameter.py	94.23% <0.00%> (+1.92%)	:arrow_up:
src/gluonnlp/attention_cell.py	80.39% <0.00%> (+6.66%)	:arrow_up:

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[github-actions[bot]]

The documentation website for preview: http://gluon-nlp-staging.s3-accelerate.dualstack.amazonaws.com/PR1435/try_reenable_test/index.html