bugfix: fixed error of get server port in container

[helloworlde]

Ⅰ. Describe what this PR did

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

[zjinlei]

LGTM

[codecov-io]

Codecov Report

Merging #1973 into develop will decrease coverage by 0.04%.
The diff coverage is 0%.

@@              Coverage Diff              @@
##             develop    #1973      +/-   ##
=============================================
- Coverage      55.29%   55.24%   -0.05%     
+ Complexity      2433     2431       -2     
=============================================
  Files            431      431              
  Lines          14442    14442              
  Branches        1708     1708              
=============================================
- Hits            7985     7979       -6     
- Misses          5733     5736       +3     
- Partials         724      727       +3

Impacted Files	Coverage Δ	Complexity Δ
...src/main/java/io/seata/server/ParameterParser.java	46.8% <0%> (ø)	11 <0> (ø)	⬇️
...server/store/file/FileTransactionStoreManager.java	56.5% <0%> (-0.96%)	29% <0%> (ø)
...very/registry/zk/ZookeeperRegisterServiceImpl.java	63.77% <0%> (-0.79%)	25% <0%> (ø)
...in/java/io/seata/server/session/GlobalSession.java	84.54% <0%> (-0.49%)	67% <0%> (-1%)
...o/seata/server/coordinator/DefaultCoordinator.java	48.01% <0%> (-0.4%)	27% <0%> (-1%)

[xingfudeshi]

LGTM.