Beekeeper fixes

• Issue #557 (closed) beekeeper | Notification about closing wallet is sent multiple times
• Issue #558 (closed) beekeeper | Format of "Opening beekeeper failed" notification changed and is now confusing
• Issue #566 (closed) beekeeper | --version flag is returning empty response.
• Issue #569 (closed) beekeeper | Misleading information in error message while opening wallet thorough open api call
• Issue #572 beekeeper | SIGINT randomly closes with -2 return code and do not removes the beekeeper.pid file