Fix some security manager permission issues
EJBCLIENT-106 hidden root cause for client Serialisation issues
[EJBCLIENT-98] do not shudown executor, have reconnect tasks check if context closed
[EJBCLIENT-109] At MethodInvocationResponseHandler$MethodInvocationResponseProducer.discardResult: skip the bytes in the response, and close the DataInputStream afterwards
Merge pull request #68 from fl4via/1.0

[EJBCLIENT-109] At MethodInvocationResponseHandler$MethodInvocationRespo...
Release 1.0.26.Final
Next is 1.0.27.Final
[EJBCLIENT-110] ClusterContext does not check managed nodes when adding ClusterNodeManagers.
[EJBCLIENT-78] if shutdown() is called remove the shutdown task if the shutdown task is not initiating the shutdown()
EJBCLIENT-104: run tests with security manager and provide fixes