2018-01-15: wato zycel_flash, zyxel_mem
2018-01-16: metric zyxcel_wlc, check zyxel_wlancontrolleraptable, zyxel_capwap
2018-01-17: inventory snmp_zyxel_common, check zyxel_mem, zyxel_cpu, zyxel_flash, zyxel_foreign_aps
2018-01-18: wato zyxel_cpu
2018-01-21: wato zycel_roreign_aps