bugfix: get table meta fail when table name was keyword

[l81893521]

Ⅰ. Describe what this PR did

Fix get table meta fail when table name was keyword

Ⅱ. Does this pull request fix one issue?

#1662

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 #1663 into develop will decrease coverage by 0.01%.
The diff coverage is 100%.

@@              Coverage Diff              @@
##             develop    #1663      +/-   ##
=============================================
- Coverage      47.36%   47.35%   -0.02%     
+ Complexity      1779     1778       -1     
=============================================
  Files            362      362              
  Lines          13167    13168       +1     
  Branches        1633     1633              
=============================================
- Hits            6237     6236       -1     
- Misses          6255     6256       +1     
- Partials         675      676       +1

Impacted Files	Coverage Δ	Complexity Δ
...seata/rm/datasource/sql/struct/TableMetaCache.java	55.97% <100%> (+0.27%)	14 <0> (ø)	⬇️
...o/seata/server/coordinator/DefaultCoordinator.java	50% <0%> (-0.91%)	26% <0%> (-1%)

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[slievrly]

LGTM

[xingfudeshi]

LGTM.