[Style] Check indentation

[kaijchen]

What changes were proposed in this pull request?

1. Set indentation rules in checkstyle
2. Fix violations.

Why are the changes needed?

#54

Does this PR introduce any user-facing change?

No.

How was this patch tested?

https://github.com/kaijchen/incubator-uniffle/runs/7351765430?check_suite_focus=true

[codecov-commenter]

Codecov Report

Merging #56 (7086c41) into master (aa02ee6) will decrease coverage by 0.01%.
The diff coverage is 63.38%.

@@             Coverage Diff              @@
##             master      #56      +/-   ##
============================================
- Coverage     54.89%   54.88%   -0.02%     
- Complexity     1092     1093       +1     
============================================
  Files           146      146              
  Lines          7775     7775              
  Branches        749      749              
============================================
- Hits           4268     4267       -1     
- Misses         3270     3271       +1     
  Partials        237      237              

Impacted Files	Coverage Δ
...n/java/org/apache/hadoop/mapreduce/RssMRUtils.java	32.50% <0.00%> (ø)
...pache/hadoop/mapreduce/task/reduce/RssShuffle.java	0.00% <0.00%> (ø)
...apache/hadoop/mapreduce/v2/app/RssMRAppMaster.java	0.00% <ø> (ø)
.../org/apache/uniffle/common/config/ConfigUtils.java	22.36% <0.00%> (ø)
...rg/apache/uniffle/storage/common/LocalStorage.java	44.68% <0.00%> (ø)
...torage/handler/impl/ComposedClientReadHandler.java	0.00% <ø> (ø)
...e/uniffle/storage/handler/impl/HdfsFileWriter.java	55.22% <0.00%> (ø)
...e/storage/handler/impl/HdfsShuffleReadHandler.java	51.02% <0.00%> (ø)
...handler/impl/LocalFileQuorumClientReadHandler.java	0.00% <0.00%> (ø)
.../storage/handler/impl/MemoryClientReadHandler.java	0.00% <ø> (ø)
... and 17 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 aa02ee6...7086c41. Read the comment docs.

[jerqi]

It's OK for me. And cc @colinmjj

[colinmjj]

+1, LGTM

[kaijchen]

Thanks @jerqi and @colinmjj for the review.