newdevice: Added basic support for Omnitron iConverters (#6336)

* Added basic support for Omnitron iConverters

* Fixed discovery issue & cropped logo

includes/definitions/omnitron-iconverter.yaml

@@ -0,0 +1,12 @@
+os: omnitron-iconverter
+text: 'Omnitron iConverter'
+type: management
+icon: omnitron
+mib_dir:
+    - omnitron
+#over:
+    #- { graph: device_current, text: 'Current' }
+    #- { graph: device_voltage, text: 'Voltage' }
+discovery:
+    - sysObjectId:
+        - .1.3.6.1.4.1.7342.5.

includes/polling/os/omnitron-iconverter.inc.php

@@ -0,0 +1,14 @@
+<?php
+
+// SNMPv2-MIB::sysDescr.1 = STRING: "Omnitron iConverter GM4-HPOE 8991T14F v4.5.28 s/n 00711452 - [x]"
+$description = $poll_device['sysDescr'];
+
+preg_match('~Omnitron\siConverter\s(?\'hardware\'.*?)\s(?\'version\'v.*) s\/n~', $description, $matches);
+
+if ($matches['hardware']) {
+    $hardware = $matches['hardware'];
+}
+
+if ($matches['version']) {
+    $version = $matches['version'];
+}