[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
As discussed with Emmanuel after initially commenting on the PR, we worked out that it is easier to do this deprecate/copy at this stage and to have https://issues.jboss.org/browse/WFCORE-11 and https://issues.jboss.org/browse/WFLY-3638 to clean this up once the version this gets merged for (probably 1.0.0.Alpha4) is out.