Added checks to server IPC handler for failure to build or send coap write requests.
Added checks to server IPC handler for failure to build or send coap write requests.

Now if an internal error occurs, an AwaError_Internal tag will be added to the
response for that object / object instance node.

Signed-off-by: Roland Bewick <42ffbc7f64690fa2523289d2f0c3c0bbbf50c83f@imgtec.com>

DavidAntliff/AwaLWM2M,FlowM2M/AwaLWM2M,DavidAntliff/AwaLWM2M,FlowM2M/AwaLWM2M,DavidAntliff/AwaLWM2M,DavidAntliff/AwaLWM2M,FlowM2M/AwaLWM2M,FlowM2M/AwaLWM2M