[Feature] Add Omnisource training configs

[kennymckormick]

No description provided.

[codecov]

Codecov Report

Merging #296 into master will increase coverage by 2.60%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #296      +/-   ##
==========================================
+ Coverage   82.59%   85.19%   +2.60%     
==========================================
  Files          95       91       -4     
  Lines        6867     6594     -273     
  Branches     1126     1073      -53     
==========================================
- Hits         5672     5618      -54     
+ Misses        982      769     -213     
+ Partials      213      207       -6     

Flag	Coverage Δ
#unittests	85.19% <ø> (+2.60%)	⬆️

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

Impacted Files	Coverage Δ
mmaction/core/__init__.py	100.00% <0.00%> (ø)
mmaction/datasets/__init__.py	100.00% <0.00%> (ø)
mmaction/datasets/pipelines/__init__.py	100.00% <0.00%> (ø)
mmaction/datasets/image_dataset.py
mmaction/core/runner/__init__.py
mmaction/core/runner/omnisource_runner.py
mmaction/datasets/rawvideo_dataset.py
mmaction/core/evaluation/accuracy.py	89.85% <0.00%> (+2.23%)	⬆️
mmaction/datasets/pipelines/loading.py	89.18% <0.00%> (+3.02%)	⬆️
mmaction/apis/train.py	19.04% <0.00%> (+4.04%)	⬆️
... and 4 more

---

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 bccc96a...6ac3be4. Read the comment docs.

[innerlee]

changelogs are very easy to get conflicted. one way is to insert your line randomly in its section, rather than appending to the end.
this will help git diff tools

[innerlee]

btw, remove all the css classes in the table

[kennymckormick]

@innerlee resolved

[innerlee]

hmm