QPID-7622: [Java Broker/0-x JMS Client] Separate Broker / Client; eliminate common

This commit replaces svn commits r1782048 (https://svn.apache.org/r1782048) and
r1781783 (https://svn.apache.org/r1781783) during svn to git migration to allow
retaining the prior history of the files in git.

* remove broker
* new parent POM
* common code copied to client (package unchanged)
* POMs manually fixed up
* No elimination of broker-only code from client yet
3244 files changed