* split siteboss 530 and 550 into multiple OS
* add more sensors to siteboss550 and new Percent sensor
* fix contact closure event state values
* split os polling for siteboss to siteboss530 and siteboss550
* add test unit for siteboss550, rename test unit for siteboss to siteboss530
* refactor siteboss os polling to \Librenms\OS
* implement OSPolling to Sitebos550
* force save in pollOS() to keep custom sysName during polling
* updated unit test
* update device graphs
* remove pollOS and extra save()
* siteboss550 no longer extends OSPolling
* update siteboss550 test data
* update discoverOS() to match recent os discovery changes
* styleCI changes
* fix siteboss hardware discovery; add check to OS polling if os_group .inc file exists
* collapse siteboss to single OS, implement siteboss sensors in advanced discovery
* add siteboss unit tests
* removed unneeded OS disco defs
* styleCI changes
* more styleCI changes
* split siteboss os to siteboss530 and siteboss550
* split siteboss os to siteboss530 and siteboss550
* move php polling back into yaml
* keep original siteboss OS name
* resave snmp data for siteboss OS
* resave snmp data for siteboss550 OS
