Revert "WFLY-1548" which imports classes not available in some JDKs

This reverts commit b0683f6a4a01feab41f292c49de20f7e3d0a04c9.
[WFLY-490] / [WFLY-1980] Properly apply the ACCESS_CONTROL sensitivity classification
[WFLY-490] [WFLY-2063] adjust tests for the use-realm-roles removal
[WFLY-2063] / [WFLY-490] Remove support for use-realm-roles attribute.
[WFLY-490] i18n fixes
[WFLY-2066] / [WFLY-490] Upgrade to Remoting JMX 2.0.0.CR2
[WFLY-2052] / [WFLY-490] Inform user whey they are not being prompted for a realm if it is either supplied on the command line or it was discovered from the property files.
[WFLY-743] Protect against NullPointerException introduced by this change.
[WFLY-490] Guard against bogus attributes in the resource description

Conflicts:
	controller/src/main/java/org/jboss/as/controller/operations/global/ReadResourceDescriptionHandler.java
[WFLY-2075] Filter out bogus attributes from set of MBeanAttributeInfo