https://issues.apache.org/jira/browse/AMQ-4855

Deprecate the misspelled subcription named getters and use the correctly
spelled versions where the older ones are in use.
https://issues.apache.org/jira/browse/AMQ-4853

adds a little test and preserves some performance tests if needed later.
https://issues.apache.org/jira/browse/AMQ-4869