Please modify your maven settings.xml like below before attempting to run 'mvn clean test'

<profile>
  <id>aws</id>
  <activation>
    <activeByDefault>true</activeByDefault>
  </activation>
  <properties>
    <jclouds.aws.accesskeyid>YOUR_ACCESS_KEY_ID</jclouds.aws.accesskeyid>
    <jclouds.aws.secretaccesskey>YOUR_SECRET_KEY</jclouds.aws.secretaccesskey>
  </properties>
</profile>