test-connection-in-pool operation on datasources is not working [1].

This issue is a test blocker for us as it highly complicates test development and prevents RFE verification. 



[1] 
/subsystem=datasources/data-source=ExampleDS:test-connection-in-pool
{
    "outcome" => "failed",
    "failure-description" => "JBAS010440: failed to invoke operation: JBAS010447: Connection is not valid",
    "rolled-back" => true
}