[MDEP-629] Unpack goal with includes/excludes does not honor marker files

**[Jörg Delker](https://issues.apache.org/jira/secure/ViewProfile.jspa?name=joergd)** opened **[MDEP-629](https://issues.apache.org/jira/browse/MDEP-629?redirect=false)** and commented

When using the unpack goal to extract an artifact dependency, that action is performed regardless of any previous run which already created a marker file.

Consider this pom extract:

```

org.apache.maven.plugins
maven-dependency-plugin
3.1.1


unpack
generate-sources

unpack


${my.excludes}


groupid
artifactid
war
false

```

After executing "mvn generate-sources", the following marker file has been created:

`target/dependency-maven-plugin-markers/myartifactfile-1.01480985089`

Obviously, this file is not checked when this run is repeated.

---

**Affects:** 3.1.1

Start by reproducing the unpack goal with the shown Maven configuration and the target/dependency-maven-plugin-markers/myartifactfile-1.01480985089 marker path. Verify repeated mvn generate-sources behavior with includes or excludes; done means an existing marker is honored while the unpack operation still applies the configured filters.

Written by the indexing model from the issue text.