newdevice: Added support for Cisco's AsyncOS (#6545)

* Create asyncos.yaml

Added device definition for AsyncOS devices.

* Create asyncos.inc.php

Add poller definition for Async devices.

* Update asyncos.yaml

Added discovery modules.

* Update asyncos.inc.php

Refactored version, hardware, and serial parsers.

* Add AsyncOS MIBs

Add MIBs for AsyncOS WSA and ESA appliances.

* Added OS test

* AsyncOS Refactoring/OS Support

* Change serial number in unit OS test

tests/OSDiscoveryTest.php

@@ -258,6 +258,11 @@ class DiscoveryTest extends \PHPUnit_Framework_TestCase
         $this->checkOS('asuswrt-merlin');
     }
 
+    public function testAsyncOS()
+    {
+        $this->checkOS('asyncos');
+    }
+
     public function testAvayaers()
     {
         $this->checkOS('avaya-ers');