[WFLY-2335] fix BroadcastGroupAdd model population on JDK8

Running tests with JDK8 revealed an issue with that code: there is no
guarantee when populating the broadcast-group model that the connector
resources have already been populated and that we can check them.
That seems to be the case with JDK7 but not with JDK8 (likely due to
Collections implementation details).

Fix this by checking the validation of connector-refs in another MODEL
OperationStepHandler ran *after* all the other MODEL's OSHs.
[WFLY-2291] Update messaging XML namespace to 2.0

The XML namespace for the messaging subsystem was erroneously bumped
from 1.3 to 1.4 for WildFly 8.

This is an error as the 1.x version must be reserved for AS7 7.x releases.
WildFly 8 must use a 2.0 namespace.
refactor messaging tests for resource transformers
[WFLY-490] / [WFLY-2258] Add sensitivity classification to 'describe' operation; actually enforce constraints on the READ_WHOLE_CONFIG ops
Update to HAL 2.0.5.Final
[WFLY-2332] Exclude jboss-logmanager from remoting-jmx, hornetq-journal and narayana-jts-jacorb