Discovery Server fix reconnection [12522] [14221] (backport #2246)

[mergify]

This is an automatic backport of pull request #2246 done by Mergify.
Cherry-pick of 4368260 has failed:

On branch mergify/bp/2.1.x/pr-2246
Your branch is up to date with 'origin/2.1.x'.

You are currently cherry-picking commit 436826000.
  (fix conflicts and run "git cherry-pick --continue")
  (use "git cherry-pick --skip" to skip this patch)
  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

Changes to be committed:
	modified:   include/fastdds/rtps/builtin/discovery/participant/PDPClient.h
	modified:   src/cpp/rtps/builtin/discovery/database/DiscoveryDataBase.cpp

Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   src/cpp/rtps/builtin/discovery/participant/PDPClient.cpp
	both modified:   src/cpp/rtps/builtin/discovery/participant/PDPServerListener.cpp

To fix up this pull request, you can check it out locally. See documentation: https://docs.github.com/en/github/collaborating-with-pull-requests/reviewing-changes-in-pull-requests/checking-out-pull-requests-locally

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[richiprosima]

Can't set status; build failed.

[MiguelCompany]

@richiprosima Please test this