Make jacoco work with integration tests

[jonesbusy]

What feature do you want to see added?

Right now coverage is only computed on unit tests

When we run integration tests with failsafe and 'java -jar..' we should add the argLine to the execution and make sure the execution is merged with previous jacoco execution.

Possible code change on CommandLineIT if we need to pass the jacoco argLine ?

Properties properties = new Properties();
String changeList = System.getProperty("set.changelist");
if (changeList != null) {
    properties.put("set.changelist", "true");
}
properties.put("exec.executable", javaHome.resolve("bin/java").toString());
properties.put("test.cliArgs", args);
request.setProperties(properties);
``

### Upstream changes

No code change expected, and maven config

[jonesbusy]

Good first issue if someone interested by Maven config and jacoco coverage

[jonesbusy]

Some resource https://dev.to/arturmkr/how-to-measure-code-coverage-in-a-running-java-application-using-jacoco-5b13

[jonesbusy]

Dis some quick test without maven

curl -O https://repo1.maven.org/maven2/org/jacoco/org.jacoco.cli/0.8.12/org.jacoco.cli-0.8.12-nodeps.jar 
curl -O https://repo1.maven.org/maven2/org/jacoco/org.jacoco.agent/0.8.12/org.jacoco.agent-0.8.12-runtime.jar

# Run with agent
java '-javaagent:org.jacoco.agent-0.8.12-runtime.jar=port=6300,address=0.0.0.0,destfile=jacoco.exec,includes=io.jenkins.tools.pluginmodernizer.*,append=true,output=tcpserver' -jar plugin-modernizer-cli/target/jenkins-plugin-modernizer-999999-SNAPSHOT.jar build-metadata --plugins echarts-api --debug

# On other shell
java -jar org.jacoco.cli-0.8.12-nodeps.jar dump --address localhost --port 6300 --destfile jacoco.exec --reset
java -jar org.jacoco.cli-0.8.12-nodeps.jar report jacoco.exec --classfiles plugin-modernizer-core/target/classes --sourcefiles plugin-modernizer-core/src/main/java --html coverage_report

Now we need to integration with failsafe, maven exec and jacoco plugin.

And merge all together with previous unit tests

[Yash-jaiswal2509]

Hi, as I was working on this. I wanted to know if I will have to also change pom.xml and pom-it.xml to integrate jacoco.

[jonesbusy]

Most likely yes.