Add 840_DK, removes KXXF; removes some trivial BLE seamples,add Gatt,ADV

Author: ConradBraam

tools/test/examples/examples.json

@@ -37,18 +37,21 @@
       "name": "mbed-os-example-ble",
       "github":"https://github.com/ARMmbed/mbed-os-example-ble",
       "mbed": [
-          "https://os.mbed.com/teams/mbed-os-examples/code/mbed-os-example-ble-Beacon",
-          "https://os.mbed.com/teams/mbed-os-examples/code/mbed-os-example-ble-HeartRate",
-          "https://os.mbed.com/teams/mbed-os-examples/code/mbed-os-example-ble-Thermometer",
-          "https://os.mbed.com/teams/mbed-os-examples/code/mbed-os-example-ble-LEDBlinker",
-          "https://os.mbed.com/teams/mbed-os-examples/code/mbed-os-example-ble-LED",
-          "https://os.mbed.com/teams/mbed-os-examples/code/mbed-os-example-ble-GAPButton",
+          "https://os.mbed.com/teams/mbed-os-examples/code/mbed-os-example-ble-BatteryLevel",
           "https://os.mbed.com/teams/mbed-os-examples/code/mbed-os-example-ble-Button",
-          "https://os.mbed.com/teams/mbed-os-examples/code/mbed-os-example-ble-BatteryLevel"
+          "https://os.mbed.com/teams/mbed-os-examples/code/mbed-os-example-ble-GAP",
+          "https://os.mbed.com/teams/mbed-os-examples/code/mbed-os-example-ble-GAPButton",
+          "https://os.mbed.com/teams/mbed-os-examples/code/mbed-os-example-ble-GattClient",
+          "https://os.mbed.com/teams/mbed-os-examples/code/mbed-os-example-ble-GattServer",
+          "https://os.mbed.com/teams/mbed-os-examples/code/mbed-os-example-ble-HeartRate",
+          "https://os.mbed.com/teams/mbed-os-examples/code/mbed-os-example-ble-PeriodicAdvertising",
+          "https://os.mbed.com/teams/mbed-os-examples/code/mbed-os-example-ble-privacy",
+          "https://os.mbed.com/teams/mbed-os-examples/code/mbed-os-example-ble-SM",
+          "https://os.mbed.com/teams/mbed-os-examples/code/mbed-os-example-ble-Thermometer"
       ],
       "test-repo-source": "mbed",
       "features" : ["BLE"],
-      "targets" : ["NRF51_DK", "NRF52_DK", "K66F", "NUCLEO_F401RE"],
+      "targets" : ["NRF51_DK", "NRF52_DK", "NRF52840_DK", "NUCLEO_F401RE"],
       "toolchains" : [],
       "exporters": [],
       "compile" : true,