[WFLY-543] : Provide an operation to request service status report after server has been started

Adding the new command "read-boot-errors" available from core-service=management to list all operations that failed during boot.
It displays all boot errors with the failed operation and the failure description / exception of the error.
Jira: https://issues.jboss.org/browse/WFLY-543

Issue for removing deprecated stuff from core/wildfly
https://issues.jboss.org/browse/WFCORE-11
https://issues.jboss.org/browse/WFLY-3638
I think the ServiceContainer param to all 3 of these can be removed and the utility methods can just use a try/finally to do what ParseAndMarshalModelsTestCase does in @Before setupServiceContainer() and @After cleanup(). The "if (isInContainer())" check in those methods is pointless. If that check ever returned false, the serviceContainer field would remain null and the test would throw an NPE.