Maven Driver Repository
Database drivers should be in a repository. Currently that is http://reports.qa.atl.jboss.com/jdbc-drivers/maven2/. To see where drivers are expected look at pom.xml. Then put them into the repo (probably required for commercial drivers only).
To put files in a repo you have to use the maven deploy:deploy-file mojo/whatever. Use a command like this below and tune parameters as specified in the the testsuite/pom.xml. For the url you can use scp and ftp also.
mvn deploy:deploy-file -Durl=file://<path to repo> -Dfile=<file> -DgroupId=com.oracle -DartifactId=ojdbc14 -Dversion=10.0.2.0 -Dpackaging=jar -DgeneratePom=true
Then you have to modify user's settings.xml file so repo is known to maven. For more information look at HowToSetupHudsonMavenRepositories.
You have to specify a profile and soem parameters to have a particular database tested. Run maven with -P.