mcs: extract the common part as base server

[rleungx]

What problem does this PR solve?

Issue Number: Ref #5839.

What is changed and how does it work?

There is too many duplicated code in the different services. Maintaining one copy will help us reduce the probability of making mistakes.

Check List

Tests

• Unit test

Release note

None.

[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• JmPotato
• lhy1024

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[codecov]

Codecov Report

Merging #7013 (17c1a56) into master (7a4e1e2) will increase coverage by 0.08%.
Report is 1 commits behind head on master.
The diff coverage is 71.26%.

❗ Current head 17c1a56 differs from pull request most recent head 8a2cbac. Consider uploading reports for the commit 8a2cbac to get more accurate results

@@            Coverage Diff             @@
##           master    #7013      +/-   ##
==========================================
+ Coverage   74.20%   74.29%   +0.08%     
==========================================
  Files         433      434       +1     
  Lines       46101    46036      -65     
==========================================
- Hits        34209    34202       -7     
+ Misses       8872     8832      -40     
+ Partials     3020     3002      -18     

Flag	Coverage Δ
unittests	74.29% <71.26%> (+0.08%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

[lhy1024]

Suggested change

	// GetDelegateClient returns grpc client connection talking to the forwarded host
	// GetDelegateClient returns grpc client connection talking to the forwarded host.

[rleungx]

Maybe in another PR.

[rleungx]

/merge

[ti-chi-bot]

@rleungx: It seems you want to merge this PR, I will help you trigger all the tests:

/run-all-tests

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[ti-chi-bot]

This pull request has been accepted and is ready to merge.

Commit hash: 50ea886

[rleungx]

/merge

[ti-chi-bot]

@rleungx: It seems you want to merge this PR, I will help you trigger all the tests:

/run-all-tests

You only need to trigger /merge once, and if the CI test fails, you just re-trigger the test that failed and the bot will merge the PR for you after the CI passes.

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[ti-chi-bot]

This pull request has been accepted and is ready to merge.

Commit hash: 17c1a56

[ti-chi-bot]

@rleungx: Your PR was out of date, I have automatically updated it for you.

If the CI test fails, you just re-trigger the test that failed and the bot will merge the PR for you after the CI passes.

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