fix(maven): avoid overriding existing sonar properties

[yuliuyi717-ux]

Summary

This change avoids noisy Maven warnings caused by properties-maven-plugin overriding properties already defined in the POM during initialize.

What changed

• Added <override>false</override> to the generated properties-maven-plugin configuration in java-simple-application:code-quality.
• Added a focused test assertion to ensure generated plugin config keeps override=false.
• Updated the related snapshot.

Why

When reproducing the issue context from #22487 on current main, plugin-validation warnings are no longer reproducible with current plugin versions, but the generated build still emits a large amount of property-clash warnings from properties-maven-plugin.
This patch reduces that warning noise while keeping sonar property loading in place.

Refs #22487

Validation

npx -y node@22 ./node_modules/.bin/esmocha generators/java-simple-application/generators/code-quality/generator.spec.ts --no-insight --forbid-only

[yuliuyi717-ux]

Rebased this branch onto the latest main and pushed a fresh CI run.

Current run result:

• ✅ Most matrix jobs pass
• ❌ Two integration jobs fail with environment-style startup issues
• Failure signatures:

1. ms-mf-ng-consul-oauth2-neo4j (n24.14.0/j21)

   • BeanCreationException from Liquibase
   • org.neo4j.driver.exceptions.Neo4jException: Driver execution failed
   • reactor.blockhound.BlockingOperationError: Blocking call! jdk.internal.misc.Unsafe#park

2. ms-vue-eureka-jwt-couchbase-hazelcast (n24.14.0/j21)

   • com.couchbase.client.core.error.UnambiguousTimeoutException
   • reason: BUCKET_NOT_AVAILABLE while reading DATABASE_CHANGELOG_LOCK
   • then repeated ApplicationContext failure threshold in gateway cucumber tests

PR diff is limited to the java-simple code-quality generator (adding <override>false</override> for the properties-maven-plugin), so these two failures look unrelated to the changed files.

If possible, could a maintainer rerun the failed jobs?

[yuliuyi717-ux]

Quick update: I retriggered a fresh CI run on the latest branch head, and all checks are now green on this PR.

The previously failing matrix jobs also passed in this run:

• ms-mf-ng-consul-oauth2-neo4j (n24.14.0/j21)
• ms-vue-eureka-jwt-couchbase-hazelcast (n24.14.0/j21)

Please let me know if you’d like any follow-up changes.