Use this instead of cobertura-maven-plugin if you want the old report.
'net.sourceforge.purrpackage:purrpackageplaincobertura-maven-plugin:1.0'
<dependency>
<groupId>net.sourceforge.purrpackage</groupId>
<artifactId>purrpackageplaincobertura-maven-plugin</artifactId>
<version>1.0</version>
</dependency>
<dependency org="net.sourceforge.purrpackage" name="purrpackageplaincobertura-maven-plugin" rev="1.0"/>
"net.sourceforge.purrpackage", "purrpackageplaincobertura-maven-plugin", "1.0"