[network] Interpret ConnectException as service absent rather than pr…

…esent. (#3501)

* Interpret ConnectException as service absent rather than service present.
* Use multicatch for servicePing exception handling.

Signed-off-by: John Sichi <jsichi@gmail.com> (github: jsichi)

addons/binding/org.openhab.binding.network/src/main/java/org/openhab/binding/network/internal/utils/NetworkUtils.java

@@ -159,13 +159,8 @@ public boolean servicePing(String host, int port, int timeout) throws IOExceptio
         try (Socket socket = new Socket()) {
             socket.connect(socketAddress, timeout);
             return true;
-        } catch (NoRouteToHostException ignored) {
+        } catch (ConnectException | SocketTimeoutException | NoRouteToHostException ignored) {
             return false;
-        } catch (SocketTimeoutException ignored) {
-            return false;
-        } catch (ConnectException e) {
-            // Connection refused, there is a device on the other end though
-            return true;
         }
     }