[Fix] Fix#876

[irvingzhang0512]

Motivation

Fix #876
Create a new label map based on custom classes

Modification

Modify 2 stdet demos, create a new label map based on stdet config and original label map.

[codecov]

Codecov Report

Merging #879 (9d9a08f) into master (1056d29) will decrease coverage by 0.02%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #879      +/-   ##
==========================================
- Coverage   83.26%   83.23%   -0.03%     
==========================================
  Files         129      129              
  Lines        9421     9421              
  Branches     1612     1612              
==========================================
- Hits         7844     7842       -2     
- Misses       1185     1186       +1     
- Partials      392      393       +1     

Flag	Coverage Δ
unittests	83.23% <ø> (-0.03%)	⬇️

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

Impacted Files	Coverage Δ
mmaction/datasets/pipelines/augmentations.py	92.84% <0.00%> (-0.27%)	⬇️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 1056d29...9d9a08f. Read the comment docs.