Jacoco + Surefire Maven plugins always show 0% coverage - maven

Question

I got a multi-module maven project on which i want to generate a jacoco report with the unit coverage. Currently i am using arqullian surefire and jacoco maven plugins, which both are defined in only one module. The tests run on a JBoss EAP 7.2
Although the jacoco report is generated, i always get a 0% coverage on all my test classes which are deployed as an archive org.jboss.shrinkwrap.api.spec.WebArchive on my JBoss server even though there are several methods covered by the Unit tests.
Important: Other unit tests performed without a deployment, do show some coverage on the report
Below is my maven configuration
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.22.2</version>
<configuration>
<skip>${skipTests}</skip>
<argLine>${surefireArgLine}</argLine>
</configuration>
</plugin>
<plugin>
<artifactId>maven-surefire-report-plugin</artifactId>
<version>2.22.2</version>
</plugin>
<plugin>
<groupId>org.jacoco</groupId>
<artifactId>jacoco-maven-plugin</artifactId>
<version>0.8.5</version>
<executions>
<execution>
<id>pre-unit-test</id>
<goals>
<goal>prepare-agent</goal>
</goals>
<configuration>
<destFile>${project.build.directory}/coverage-reports/jacoco-ut.exec</destFile>
<propertyName>surefireArgLine</propertyName>
</configuration>
</execution>
<execution>
<id>post-unit-test</id>
<phase>test</phase>
<goals>
<goal>report</goal>
</goals>
<configuration>
<dataFile>${project.build.directory}/coverage-reports/jacoco-ut.exec</dataFile>
<outputDirectory>${project.reporting.outputDirectory}/jacoco-ut</outputDirectory>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
Below my dependencies used:
<dependency>
<groupId>org.dbunit</groupId>
<artifactId>dbunit</artifactId>
<version>2.7.0</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.jboss.shrinkwrap.resolver</groupId>
<artifactId>shrinkwrap-resolver-api-maven</artifactId>
<version>3.1.4</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.jboss.shrinkwrap.resolver</groupId>
<artifactId>shrinkwrap-resolver-impl-maven</artifactId>
<version>3.1.4</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.jboss.shrinkwrap.resolver</groupId>
<artifactId>shrinkwrap-resolver-spi</artifactId>
<version>3.1.4</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.jboss.arquillian.junit</groupId>
<artifactId>arquillian-junit-core</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.jboss.arquillian.junit</groupId>
<artifactId>arquillian-junit-container</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.jboss.arquillian.protocol</groupId>
<artifactId>arquillian-protocol-servlet</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.jacoco</groupId>
<artifactId>org.jacoco.core</artifactId>
<version>0.8.5</version>
<scope>test</scope>
</dependency>
Arqulian XML
<?xml version="1.0" encoding="UTF-8"?>
<arquillian xmlns="http://jboss.org/schema/arquillian" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://jboss.org/schema/arquillian http://jboss.org/schema/arquillian/arquillian_1_0.xsd">
<!-- Force the use of the Servlet 3.0 protocol with all containers, as it is the most mature -->
<defaultProtocol type="Servlet 3.0" />
<!-- Example configuration for a remote JBoss EAP 7 instance -->
<container qualifier="jboss" default="true">
<!-- If you want to use the JBOSS_HOME environment variable, just delete the jbossHome property -->
<configuration>
<!-- <property name="javaVmArguments">${jacoco.agent}</property> -->
</configuration>
</container>
</arquillian>
On one of my configurations (not the above), i remember seeing a warning that the ${jacoco.agent} was not used. So i did comment it out again.
When running the mvn clean install goal, in my console logs i see following variables set to the surefireArgLine
[INFO] --- jacoco-maven-plugin:0.8.5:prepare-agent (pre-unit-test) # alis-ejb ---
[INFO] surefireArgLine set to -javaagent:C:\\Users\\user\\.m2\\repository\\org\\jacoco\\org.jacoco.agent\\0.8.5\\org.jacoco.agent-0.8.5-runtime.jar=destfile=c:\\Projects\\Projectname\\ejb-module\\target\\coverage-reports\\jacoco-ut.exec
All my tests are executed normaly and i am able to generate a surefire report command with surefire-report that lists all the unit test executions. I am thinking if am missing a mvn goal for jacoco that calculates the coverage, but it looks that i am still missing something
Update 1: I start to believe that the issue is created due to the usage of Arquilian, and i should use the pre-integration-test phases instead. But not sure yet.
Update 2: I just noticed that for one of my Unit tests i see some coverage. The difference between this unit test and the rest is the one Class containing the tests of which a coverage as shown, are simple Unit tests, whereas for the rest of my Test classes on which i do not get a coverage report from Jacoco a org.jboss.shrinkwrap.api.spec.WebArchive deployment is created. Some more details on this. 90% of my tests, are of this structure. A webarchive is created and deployed on JBoss EAP 7.