optimize LockKeyConflictException and change register method

[slievrly]

Ⅰ. Describe what this PR did

1. optimize LockKeyConflictException
2. change method register(String lockKeys) to lockQuery(String lockKeys)

Ⅱ. Does this pull request fix one issue?

Ⅲ. Why don't you add test cases (unit test/integration test)?

Ⅳ. Describe how to verify it

Ⅴ. Special notes for reviews

[codecov-io]

Codecov Report

Merging #1580 into develop will decrease coverage by 0.04%.
The diff coverage is 6.25%.

@@              Coverage Diff              @@
##             develop    #1580      +/-   ##
=============================================
- Coverage      46.43%   46.39%   -0.05%     
+ Complexity      1718     1717       -1     
=============================================
  Files            350      350              
  Lines          12847    12855       +8     
  Branches        1618     1619       +1     
=============================================
- Hits            5966     5964       -2     
- Misses          6232     6242      +10     
  Partials         649      649

Impacted Files	Coverage Δ	Complexity Δ
...eata/rm/datasource/exec/LockConflictException.java	0% <0%> (ø)	0 <0> (ø)	⬇️
...n/java/io/seata/rm/datasource/ConnectionProxy.java	8.51% <7.14%> (-0.59%)	4 <0> (ø)
...server/store/file/FileTransactionStoreManager.java	46.34% <0%> (-0.7%)	19% <0%> (ø)

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[l81893521]

LGTM

[xingfudeshi]

LGTM.

[zjinlei]

LGTM