AMQ_EXTRA_OPTS overloading leads to invalid arguments

At the moment the container image AMQ_EXTRA_OPTS environment variable is used to pass the journalType argument of '-nio'/'aio' as well as the console sections ssl information. The string bashing going on here either in the operator or in the scripts is sometimes causing the AMQ_EXTRA_OPTS argument value to incorrectly be just '-'.

This in turn causes the ./bin/artemis/create command to fail and thus the container fail to start.