Proper Beaconing

[jmgasper]

The beaconing is in a shell script beacon.sh. We should move this to the gattServer or main so that the device beacons the string RDK Setup on start. The name should be configurable.

A function should be added

void startBeacon(std::string const& s)

This RDK Setup name should show up in the mobile app when scanning. There are several GATT browser apps for both iOS and Android in the app stores to test.