[MDEP-691] useBaseVersion ignored when resolving artifacts from local repository (works from remote)

**[Jakub Bochenski](https://issues.apache.org/jira/secure/ViewProfile.jspa?name=jbochenski)** opened **[MDEP-691](https://issues.apache.org/jira/browse/MDEP-691?redirect=false)** and commented

Please compare the results. `-Psonatype` enables remote sonatype snapshots repository.

```
$ mvn dependency:copy -Dartifact=com.trello.identifier:package-identifier:0.0.2-SNAPSHOT -Psonatype -U -Dmdep.useBaseVersion=false | grep Copying
[INFO] Copying package-identifier-0.0.2-SNAPSHOT.jar to /home/bochja/${project.basedir}/target/dependency/package-identifier-0.0.2-20190311.143402-1.jar
$ rm -rf '/home/bochja/${project.basedir}/target/dependency'
$ mvn dependency:copy -Dartifact=com.trello.identifier:package-identifier:0.0.2-SNAPSHOT -Psonatype -U -Dmdep.useBaseVersion=true | grep Copying
[INFO] Copying package-identifier-0.0.2-SNAPSHOT.jar to /home/bochja/${project.basedir}/target/dependency/package-identifier-0.0.2-SNAPSHOT.jar
$ rm -rf '/home/bochja/${project.basedir}/target/dependency'
$ mvn dependency:copy -Dartifact=com.trello.identifier:package-identifier:0.0.2-SNAPSHOT -o -Dmdep.useBaseVersion=true | grep Copying
[INFO] Copying package-identifier-0.0.2-SNAPSHOT.jar to /home/bochja/${project.basedir}/target/dependency/package-identifier-0.0.2-SNAPSHOT.jar
$ rm -rf '/home/bochja/${project.basedir}/target/dependency'
$ mvn dependency:copy -Dartifact=com.trello.identifier:package-identifier:0.0.2-SNAPSHOT -o -Dmdep.useBaseVersion=false | grep Copying
[INFO] Copying package-identifier-0.0.2-SNAPSHOT.jar to /home/bochja/${project.basedir}/target/dependency/package-identifier-0.0.2-SNAPSHOT.jar
$ ls ~/.m2/repository/com/trello/identifier/package-identifier/0.0.2-SNAPSHOT/
maven-metadata-sonatype.xml maven-metadata-sonatype.xml.sha1 package-identifier-0.0.2-20190311.143402-1.jar package-identifier-0.0.2-20190311.143402-1.jar.sha1 package-identifier-0.0.2-SNAPSHOT.jar _remote.repositories resolver-status.properties
```

---
No further details from [MDEP-691](https://issues.apache.org/jira/browse/MDEP-691?redirect=false)

Start by reproducing the four `mvn dependency:copy` commands shown in the issue, comparing remote and offline resolution with `-Dmdep.useBaseVersion` set to true and false. Trace the dependency-copy resolution path used by those commands and verify that local repositories honor the flag by checking the copied artifact filename against the expected base or timestamped version.

Written by the indexing model from the issue text.