Move to minho namespace and hide karaf one

[rmannibucau]

Goal of this ticket is to use groupId and package org.apache.minho and not mention karaf in it since project is quite indenpendent.
Will likely help to understand what we run, in particular when we'll run OSGi container (Apache Karaf) inside Apache Karaf Minho.

Side note: important step: request minho group to infra on nexus.

[jbonofre]

+1 about that, but the only issue if that I need to ask infra to push SNAPSHOTs artifact on org.apache.minho (as we only have permission on org.apache.karaf) :)

[jbonofre]

As we plan to move Minho to Apache Sunny, I'm holding this issue for now.