Description of problem:
 Currently the only validation for JNDI names is: JNDI name has to start with 'java:/' or 'java:jboss/'. But user is able to enter just 'java:/' or 'java:jboss/' as JNDI name. Using this JNDI name for eg. data-source will lead to java.lang.IllegalArgumentException: Empty name segment is not allowed for jboss. Further more this data-source cannot be removed (expect deleting from XML directly).


Version-Release number of selected component (if applicable):
 EAP 6.2.0.ER5

How reproducible:
 Always

Steps to Reproduce:
 1. Start out-of-box EAP 
 2. Connect to EAP eg. via web console
 3. Add a new Datasource (use 'java:/' or 'java:jboss/' as JNDI name)
 4. Enable the datasource

Actual results:
13:26:02,708 ERROR [org.jboss.as.controller.management-operation] (HttpManagementService-threads - 2) JBAS014612: Operation ("enable") failed - address: ([
    ("subsystem" => "datasources"),
    ("data-source" => "test")
]): java.lang.IllegalArgumentException: Empty name segment is not allowed for java

Expected results:
 User is unable to use 'java:/' or 'java:jboss/' as JNDI name.