[WFLY-490] Handle null value from AttributeDefinition.getDefaultValue()
[WFLY-490] / [WFLY-1789] Add authorization check to readResourceForUpdate
[WFLY-456] Audit Logging - squashed the below commits since master has changed so much

[WFLY-456] Minor OperationContext impl cleanups
[WFLY-456] Bring in John Bailey's audit log classes
[WFLY-456] Add real audit loggers into the model controllers; integrate management handlers
[WFLY-456] Log the full set of information
[WFLY-456] Fix problems from rebase
[WFLY-456] Use SecurityContext when invoking JMX methods via remoting
[WFLY-456] Move core security classes into own module
[WFLY-456]  Rework things and make the controller logger work
[WFLY-456] Include the access mechanism in the log, move some more classes to core-security
[WFLY-456] Make audit logger available to JMX
[WFLY-456] Pluggable MBeanServer delegate to audit logger, and loads of exception handling
[WFLY-456] Jmx audit log proxy
[WFLY-456] Separate the configuration for the core controller and jmx audit logs
[WFLY-456] Set the booting flag in the jmx layer
[WFLY-456] Integrate audit logging resource and ops into JMX extension so it can be configured there
[WFLY-456] Correct copyright notices in my new files
[WFLY-456] fix problems from rebase
[WFLY-456] Get rid of the original hashing implementation
[WFLY-456] Add missing originalResultTxControl from rebase
[WFLY-456] Add config for appenders
[WFLY-456] Basic file appender and json formatter. The output needs cleaning up and everything is currently hardcoded
[WFLY-456] Back up the previous log file. Basic syslog appender (awaiting the improved logmanager SyslogHandler)
[WFLY-456] Use the org.wildfly:wildfly-xxx names. Start configuring file appenders
[WFLY-456] Configure model for syslog appender
[WFLY-456] Log audit log records for ParallelBootOperationContext and ReadOnlyContext
[WFLY-456] Make whether to log on boot configurable
[WFLY-456] Be able to add/remove appender references at runtime and update the appenders at runtime
[WFLY-456] Add boot-log to jmx audit-log as well and update xsd's for both core and jmx
[WFLY-456] Make additive changes to appenders take effect right away, and delay changes/removals until the current audit record has been written
[WFLY-456] Add schema support and parsing for managed server path overrides, and clean up the handlers
[WFLY-456] Use 'handler' rather than 'appender'
[WFLY-456] Pass in audit log operations to managed servers on boot
[WFLY-456] Separate handler chains for host and managed server audit logs
[WFLY-456] i18n and get rid of code no longer needed
[WFLY-456] Fix problems from rebase, revisit security after moved WildFlySecurityManager
[WFLY-456] Flesh out the syslog handler, tried with UDP
[WFLY-456] Start testing the handlers and ops
[WFLY-456] Set up proper syslog host and app names
[WFLY-456] More tests
[WFLY-456] Complete renaming appender->handler. Really
[WFLY-456] Nicer separate configuration for JMX
[WFLY-456] Better testing for enabled and log-read-only audit log write attribute handlers
[WFLY-456] Separate handlers for JMX subsystem audit logging, and tests
[WFLY-456] Maintan a failure count per appender
[WFLY-456] Configure the json formatter and reference from the audit log handlers

Expose 'max-length' and 'truncate' for the syslog handler
[WFLY-456] Make audit logging work in admin-only mode

Fix bug not enabling the appender in domain mode
[WFLY-456] Fixes to tls syslog handler having tried it out against rsyslog
[WFLY-456] don't enable log by default
[WFLY-456] Test jmx audit log transformation
[WFLY-456] Test audit logging in testsuite
[WFLY-456] Move new i18n bits into domain-management, rather than using the ones from controller
[WFLY-456] Recycle handler operation, make max-failure-count configurable per handler, expose runtime attributes for handler failure counts
[WFLY-456] Use strings instead of byte[] for the formatters for now. We can revisit the byte[] part if more tamper detecting formatters are used in the future
[WFLY-456] Use platform independent line terminator
[WFLY-456] Changes to work with latest logmanager following a squash