[openhabcloud] reconnect on connection errors (#11153)

[openhabcloud] reconnect on connection errors (#11153)

* [openhabcloud] reconnect on connection errors

According to documentation (albeit for 2.x Socket IO version) [1],
reconnection is responsibility of the user on connect_error events.

[1] Lifecycle diagram in
  https://socketio.github.io/socket.io-client-java/socket_instance.html

Signed-off-by: Sami Salonen <ssalonen@gmail.com>
* [openhabcloud] Update Socket IO dependency to 1.0.1

Signed-off-by: Sami Salonen <ssalonen@gmail.com>
* [openhabcloud] feature.xml updated also with socket io 1.0.1

Signed-off-by: Sami Salonen <ssalonen@gmail.com>
* [openhabcloud] Re-connect manually on error events when not connected

Signed-off-by: Sami Salonen <ssalonen@gmail.com>
* [openhabcloud] less loud logging on retries

Signed-off-by: Sami Salonen <ssalonen@gmail.com>
* [openhabcloud] removing unnecessary conditional in logging

Signed-off-by: Sami Salonen <ssalonen@gmail.com>
* [openhabcloud] javadoc corrections and clarifications

Signed-off-by: Sami Salonen <ssalonen@gmail.com>