Updated device cache support (#10795)

* Device Cache
also some additional device related models

* attribs from cache

* replace common attribute functions

* remove legacy cache usage
tidy up some collection manipulation
remove some unused or single use functions

* cleanup some items

* always return a device, to prevent bugs

* clear device cache when testing after each test

* fix double assignment

* Clean up function to take advantage of null object

discovery.php

@@ -117,6 +117,7 @@ if (!empty(\LibreNMS\Config::get('distributed_poller_group'))) {
 
 global $device;
 foreach (dbFetch("SELECT * FROM `devices` WHERE disabled = 0 AND snmp_disable = 0 $where ORDER BY device_id DESC", $sqlparams) as $device) {
+    DeviceCache::setPrimary($device['device_id']);
     $discovered_devices += (int)discover_device($device, $module_override);
 }