net-mgmt/check_nwc_health: Update to 10.9.1.2

Changes since 10.3:

• fix issue #231, thanks log1-c
• fix an uninitialized value in Arista HW check
• improve arista power supply/cord status checks
• add Huawei wlan controller (not finished yet)
• add a temporary check for Cisco Viptela SDWAN (not for public use yet, sorry)
• bugfix in Cisco WLC, skip unused mobile stations
• add support for Viptela
• pull request 304 improves ios hardware checks (thanks dhoffend)
• rewrite detection of Juniper
• tune snmp maxreps for bgp
• add mode interface-vlan-count-macs
• fix an undef in interface-vlan-count-macs
• force interface-vlan-count-macs to cache vlans
• tweak huawei Entity-Table snmp parameters
• prepare some cisco sdwan stuff bugfix in Versa Peersubsystem
• bugfix in Checkpoint Management-Status
• bugfix in CISCO-ENVMON-MIB temperature (catch "notPresent")
• bugfix again, exists plus defined

Reported by: portscout