Avoid using specific port in ut

[XuanYang-cn]

Signed-off-by: yangxuan xuan.yang@zilliz.com

/kind improvement

[codecov]

Codecov Report

Merging #16398 (d737ef0) into master (7161a77) will increase coverage by 0.04%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master   #16398      +/-   ##
==========================================
+ Coverage   81.48%   81.53%   +0.04%     
==========================================
  Files         425      425              
  Lines       65174    65174              
==========================================
+ Hits        53107    53138      +31     
+ Misses       9598     9570      -28     
+ Partials     2469     2466       -3     

Impacted Files	Coverage Δ
internal/datacoord/segment_manager.go	81.78% <0.00%> (-1.04%)	⬇️
internal/rootcoord/import_manager.go	87.60% <0.00%> (-0.81%)	⬇️
internal/querycoord/segment_allocator.go	73.28% <0.00%> (-0.77%)	⬇️
internal/rootcoord/root_coord.go	80.67% <0.00%> (-0.11%)	⬇️
internal/rootcoord/task.go	78.62% <0.00%> (+0.38%)	⬆️
internal/proxy/impl.go	85.75% <0.00%> (+0.50%)	⬆️
internal/datacoord/server.go	73.64% <0.00%> (+0.77%)	⬆️
internal/distributed/querycoord/client/client.go	71.92% <0.00%> (+1.97%)	⬆️
internal/mq/mqimpl/rocksmq/client/client_impl.go	80.16% <0.00%> (+2.47%)	⬆️
internal/indexnode/indexnode_mock.go	87.87% <0.00%> (+3.03%)	⬆️

[sunby]

/lgtm

[congqixia]

/lgtm

[sre-ci-robot]

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