Clean up the 'TODO Elytron' issues.

./core-model-test/tests/src/test/java/org/jboss/as/core/model/test/access/RoleMappingTestCase.java
./jmx/src/test/java/org/jboss/as/jmx/rbac/JmxRbacTestCase.java
./remoting/subsystem/src/main/java/org/jboss/as/remoting/RemotingHttpUpgradeService.java
./remoting/subsystem/src/main/java/org/jboss/as/remoting/AbstractStreamServerService.java
./testsuite/standalone/src/test/java/org/wildfly/core/test/standalone/mgmt/api/core/ConfigurationChangesHistoryTestCase.java
./host-controller/src/main/java/org/jboss/as/domain/controller/plan/AbstractServerGroupRolloutTask.java
./controller/src/main/java/org/jboss/as/controller/remote/TransactionalProtocolOperationHandler.java
./controller/src/main/java/org/jboss/as/controller/ParallelBootOperationStepHandler.java
./controller/src/main/java/org/jboss/as/controller/access/management/ManagementSecurityIdentitySupplier.java
./server/src/main/java/org/jboss/as/server/mgmt/domain/HostControllerConnectionService.java
./domain-management/src/main/java/org/jboss/as/domain/management/security/UserDomainCallbackHandler.java
./domain-management/src/main/java/org/jboss/as/domain/management/security/WhoAmIOperation.java
./domain-management/src/main/java/org/jboss/as/domain/management/security/PlugInAuthenticationCallbackHandler.java
./domain-management/src/main/java/org/jboss/as/domain/management/security/JaasCallbackHandler.java
./domain-management/src/main/java/org/jboss/as/domain/management/security/KerberosCallbackHandler.java
./domain-management/src/main/java/org/jboss/as/domain/management/security/ClientCertCallbackHandler.java