QPID-7609: [System Tests] Refactor QBTC to remove 0-x client classes from the public interface (return values, formal params and checked exceptions)

This allows QBTC to be used without the 0-x client JARs being present on the classpath.
Reduce the variety of ways that system tests create test connections.

Some tests that were apparently passing under the 1.0 profile were previously creating 0-9/0-10 connections.
These have been added to the exclusions.
61 files changed