Fix for DDS Examples: Configurability

[Yankefei]

Description

In the example: In examples/cpp/ddds/Configurability/ConfigurabilityPublisher.cpp, I found that the variable no_keys has not been assigned a valid value and defaults to only 1, which will cause the following loop to only process once. According to the example code, multiple loops need to be executed based on the input user_configuration.no_keys.

After modification, subscribers can receive additional data:

pub:

sub:

@Mergifyio backport 2.10.x

Contributor Checklist

• Commit messages follow the project guidelines.
• The code follows the style guidelines of this project.
• [N/A] Tests that thoroughly check the new feature have been added/Regression tests checking the bug and its fix have been added; the added tests pass locally
• [ N/A] Any new/modified methods have been properly documented using Doxygen.
• [N/A ] Any new configuration API has an equivalent XML API (with the corresponding XSD extension)
• [N/A ] Changes are backport compatible: they do NOT break ABI nor change library core behavior.
• [N/A ] Changes are API compatible.
• [N/A ] New feature has been added to the versions.md file (if applicable).
• [ N/A] New feature has been documented/Current behavior is correctly described in the documentation.
• Applicable backports have been included in the description.

Reviewer Checklist

• The PR has a milestone assigned.
• The title and description correctly express the PR's purpose.
• Check contributor checklist is correct.
• [ N/A] If this is a critical bug fix, backports to the critical-only supported branches have been requested.
• Check CI results: changes do not issue any warning.
• Check CI results: failing tests are unrelated with the changes.

The base branch was changed.

[MiguelCompany]

LGTM with green build

[Yankefei]

@MiguelCompany Hi, I found that some sanitizers-ci tests are blocked. Is there anything else I need to do?

[MiguelCompany]

@MiguelCompany Hi, I found that some sanitizers-ci tests are blocked. Is there anything else I need to do?

Just ping me as you did! Thanks for your contribution!