Allow dumping Artemis journal to file using WildFly Management API

For debugging and investigation purposes it would useful to have CLI operation which would dump content of Artemis journal directory.

New CLI operation like print-journal-date-content would print content of journal to a file.

It would do the same thing like following Artemis CLI command:

.../activemq-artemis/artemis-distribution/target/apache-artemis-1.3.0-SNAPSHOT-bin/apache-artemis-1.3.0-SNAPSHOT/bin/artemis data print  --bindings bindings --journal journal --paging paging --large-messages largemessages

This should work only in Admin only mode as dumping journal in run-time is not possible when data changes.