init nuraft message port by the current repl svc port

[Besroy]

So we don't need to rely on cm to get the port

[codecov-commenter]

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Codecov Report

❌ Patch coverage is 0% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 55.33%. Comparing base (1a0cef8) to head (af96536).
⚠️ Report is 325 commits behind head on master.

Files with missing lines	Patch %	Lines
src/lib/replication/service/raft_repl_service.cpp	0.00%	1 Missing ⚠️
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Additional details and impacted files

@@            Coverage Diff             @@
##           master     #809      +/-   ##
==========================================
- Coverage   56.51%   55.33%   -1.19%     
==========================================
  Files         108      110       +2     
  Lines       10300    13249    +2949     
  Branches     1402     1929     +527     
==========================================
+ Hits         5821     7331    +1510     
- Misses       3894     5073    +1179     
- Partials      585      845     +260     

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