Add Huawei configuration files for testing

- Introduced a new configuration file `config.conf` for Huawei devices, detailing interface settings and VLAN configurations.
- Added an expected output JSON file `config.expected.json` to validate the parsing of Huawei configurations against expected results, including system model, serial number, and interface details.

tests/fixtures/huawei/config.conf

@@ -0,0 +1,38 @@
+# Huawei Versatile Routing Platform Software
+# VRP (R) software, Version 5.170 (S5731 V200R019C00SPC500)
+# Copyright (C) 2000-2019 HUAWEI TECH Co., Ltd.
+# 
+# DDR             Memory Size : 4096  M bytes
+# FLASH Total     Memory Size : 1024  M bytes
+# FLASH Available Memory Size : 739   M bytes
+# Pcb           Version   : VER.B
+# BootROM       Version   : 0000.04e4
+# BootLoad      Version   : 0213.0000
+# CPLD          Version   : 0104 
+# Software      Version   : VRP (R) Software, Version 5.170 (V200R019C00SPC500)
+# FLASH         Version   : 0000.0000
+# PWR1 information
+# Pcb           Version   : PWR VER.D
+# PWR2 information
+# Pcb           Version   : PWR VER.D
+# FAN1 information
+# Pcb           Version   : NA
+# FAN2 information
+# Pcb           Version   : NA
+# ESN of slot 1: 102266666666
+# ESN of slot 2: 102288888888
+interface GigabitEthernet0/0/33
+ port link-type access
+ port default vlan 101
+ loopback-detect enable
+ stp disable
+ storm-control broadcast min-rate 1500 max-rate 2500
+ storm-control multicast min-rate 1000 max-rate 2000
+ storm-control action error-down
+#
+interface Vlanif120
+ description SSH
+ ip address 10.26.196.254 255.255.255.0
+#
+vlan batch 13 26 101 to 103 110 120 130 201 to 204 209 to 212 350 360
+#