The ActiveMQ Karaf commands import the package org.apache.felix.gogo.commands.basic which was exported by karaf shell before version 3.
I first tried to change the activemq commands like we did for cxf and camel. The problem is that the activemq commands are quite generic as they simply map the activemq console commands. So they really need the package above.
So my aproach is to create the package in karaf shell with deperecated classes extending the new classes. So this should provide the necessary compat layer. There classes can be removed once all commands are switched to pure karaf 3.