Added socket file descriptor to PDU brief log messages for easier correlation...

Added socket file descriptor to PDU brief log messages for easier correlation with messages in thread pool.
Fixed system test dependency on client lib so that if a source file in the lib changes, then running a system test will force a rebuild.
Added checking of result of bus_send_request in kinetic_operation so that if a failure occurs when queueing a PDU for send it will be reported out to the client API.