For using howlabtestmaven on your project, you must declare the dependency on your POM.XML, and include the repository for download the project:
...
<repositories>
...
<repository>
<id>openlab_public_rel</id>
<url>${openlabServerPublic}/repo/software/releases/</url>
<name>Openlab RELEASES repository</name>
</repository>
</repositories>
...
<dependencies>
...
<dependency>
<groupId>es.unizar.howlab.sourceforge</groupId>
<artifactId>howlabtestmaven</artifactId>
<version>1.0</version>
</dependency>
</dependencies>
...