skip port allocation

[cheyang]

Ⅰ. Describe what this PR does

Ⅱ. Does this pull request fix one issue?

fixes #XXXX

Ⅲ. List the added test cases (unit test/integration test) if any, please explain if no tests are needed.

Ⅳ. Describe how to verify it

Ⅴ. Special notes for reviews

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 18.75000% with 26 lines in your changes are missing coverage. Please review.

Project coverage is 64.28%. Comparing base (f062da9) to head (4c395a5).

Files	Patch %	Lines
pkg/ddc/jindo/transform.go	16.66%	4 Missing and 6 partials ⚠️
pkg/ddc/jindocache/transform.go	20.00%	3 Missing and 5 partials ⚠️
pkg/ddc/jindofsx/transform.go	20.00%	3 Missing and 5 partials ⚠️

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Additional details and impacted files

@@            Coverage Diff             @@
##           master       #8      +/-   ##
==========================================
- Coverage   64.32%   64.28%   -0.05%     
==========================================
  Files         474      474              
  Lines       28420    28438      +18     
==========================================
  Hits        18281    18281              
- Misses       7965     7971       +6     
- Partials     2174     2186      +12     

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