[close #415] CI: enable spotbugs for pull request for master or push to master

[iosmanthus]

Signed-off-by: iosmanthus myosmanthustree@gmail.com

What problem does this PR solve?

Issue Number: close #415

Problem Description:

SpotBugs doesn't report in pull requests but only pushes to this repository. This commit fix it by enable SpotBugs in pushes to master or pull request to master.

[iosmanthus]

@zz-jason @marsishandsome PTAL

[codecov]

Codecov Report

Merging #532 (4d4d228) into master (d354ffc) will decrease coverage by 0.11%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##             master     #532      +/-   ##
============================================
- Coverage     32.12%   32.01%   -0.12%     
+ Complexity     1338     1332       -6     
============================================
  Files           279      279              
  Lines         17372    17372              
  Branches       1980     1980              
============================================
- Hits           5581     5561      -20     
- Misses        11184    11204      +20     
  Partials        607      607              

Impacted Files	Coverage Δ
...va/org/tikv/common/region/StoreHealthyChecker.java	51.31% <0.00%> (-13.16%)	⬇️
...ty/handler/codec/http2/Http2ConnectionHandler.java	48.65% <0.00%> (-2.94%)	⬇️
src/main/java/io/grpc/internal/ClientCallImpl.java	56.34% <0.00%> (-0.49%)	⬇️
...rc/main/java/io/grpc/netty/NettyClientHandler.java	57.11% <0.00%> (+0.86%)	⬆️

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[zz-jason]

LGTM

[iosmanthus]

@marsishandsome PTAL

[marsishandsome]

LGTM