Implement synchronous service call on worker thread

Signed-off-by: OwenPatey <owen_patey@hotmail.com>
Console application to test synchronous service invocation for long poll implementation

Signed-off-by: OwenPatey <owen_patey@hotmail.com>
Block main thread with ReadLine command and support END termination statement

Signed-off-by: OwenPatey <owen_patey@hotmail.com>