Wrong package name in taverna-maven-plugin

The taverna-maven-plugin
https://github.com/apache/incubator-taverna-osgi/tree/master/taverna-maven-plugin/src/main/java/net/sf/taverna/t2/maven/plugins

has wrong Java package name net.sf.taverna.t2.maven.plugins

Changing this to say org.apache.taverna.mavenplugin

should be straight forward as it uses Maven's @Mojo annotations.

Be aware of Maven's "Plugin Naming Convention and Apache Maven Trademark" - we have to call it taverna-maven-plugin - not maven-taverna-plugin