Avoid to deploy autogenerated pom in maven repo

[Damianofds]

As documented here http://maven.apache.org/plugins/maven-deploy-plugin/deploy-file-mojo.html#generatePom and here http://maven.apache.org/plugins/maven-deploy-plugin/deploy-file-mojo.html#pomFile in order to upload the correct pom file (and manage in the right way the transitive dependencies in projects that import the proxy as jar) the pomFile configuration param must be set.