Fixed groupId and version in pom.xml files

You could find : 

* both `org.jboss.arquillian.examples` and `org.arquillian.examples` group ids on the `pom.xml` files
* `1.0.0-SNAPSHOT` and `1.0-SNAPSHOT` versions

So some examples would not even compile. I've homogenized groupId and version, and got rid of `relativePath`.