Examples in CurieBLE reference pages don't use the function being documented

The examples included in the following pages don't use the thing being documented:

- https://www.arduino.cc/en/Reference/BLEPeripheralPoll
- https://www.arduino.cc/en/Reference/BLEPeripheralEnd
- This was previously reported in https://github.com/arduino/Arduino/issues/5375 along with some other issues found on that page.
- https://www.arduino.cc/en/Reference/BLEPeripheralSetDeviceName
- https://www.arduino.cc/en/Reference/BLEPeripheralSetAppearance
- https://www.arduino.cc/en/Reference/BLEPeripheralDisconnect
- https://www.arduino.cc/en/Reference/BLEDescriptorConstructor
- https://www.arduino.cc/en/Reference/BLECentralDisconnect
- https://www.arduino.cc/en/Reference/BLECentralPoll
- https://www.arduino.cc/en/Reference/BLECharacteristicConstructor

Originally reported at http://forum.arduino.cc/index.php?topic=482789

Open the nine CurieBLE reference pages listed in the issue and compare each example with the function or constructor documented on that page. Update the examples so they use the documented item, then verify that every listed page demonstrates its own API correctly.

Written by the indexing model from the issue text.