[WFLY-2033] fix CMT NotSupported MDB

* fix handling tx attributes of MDB
* check that EJBContext.getUserTransaction() is allowed before calling
  the component
* add test org.jboss.as.test.integration.ejb.mdb.cmt.notsupported.ContainerManagedTransactionNotSupportedTestCase
WFLY-1409 custom mail server should allow definition of independent properties
WFLY-1813 Upgrade JGroups to 3.4
WFLY-1777 Upgrade Wildfly to Infinispan 6
Fix exception message i18n.
Create WLFY-2048
[WFLY-490][WFLY-2029] If an attribute has access-type=read-only/metric, make access-control list it with write=false
[WFLY-490] add a small abstraction over various management interfaces (native, HTTP, CLI and JMX)
[WFLY-490] refactor StandardRolesBasicTestCase to use all the management interfaces
[WFLY-490] add a test for runtime reconfiguration of role mapping