Fix the wrong service and path to get the guid

The service and the path to get the guid is wrong; and the
'PropertiesChanged' also use the wrong path and interface

Test:
```
1. set the guid
busctl set-property xyz.openbmc_project.Settings /xyz/openbmc_project/inventory/item/bmc xyz.openbmc_project.Common.UUID UUID s 5c410eb0-ec99-11ec-831a-eec108c4c29c

2. restart netipmid
Jan 16 07:35:47 g220a systemd[1]: Stopping Network IPMI daemon...
Jan 16 07:35:47 g220a systemd[1]: phosphor-ipmi-net@bond1.service: Deactivated successfully.
Jan 16 07:35:47 g220a systemd[1]: Stopped Network IPMI daemon.
Jan 16 07:35:48 g220a systemd[1]: Started Network IPMI daemon.
Jan 16 07:35:48 g220a netipmid[735]: get guid
Jan 16 07:35:48 g220a netipmid-bond1[735]: 0x9c, 0xc2, 0xc4, 0x08, 0xc1, 0xee, 0x1a, 0x83, 0xec, 0x11, 0x99, 0xec, 0xb0, 0x0e, 0x41, 0x5c,

3. get the guid by ipmi
ipmitool raw 0x06 0x37
9c c2 c4 08 c1 ee 1a 83 ec 11 99 ec b0 0e 41 5c

4. change the guid property
busctl set-property xyz.openbmc_project.Settings /xyz/openbmc_project/inventory/item/bmc xyz.openbmc_project.Common.UUID UUID s 5c410eb0-ec99-11ec-831a-eec108c4c29d
Jan 16 07:36:09 g220a netipmid[735]: propertiesChanged
Jan 16 07:36:09 g220a netipmid[735]: get guid
Jan 16 07:36:09 g220a netipmid-bond1[735]: 0x9d, 0xc2, 0xc4, 0x08, 0xc1, 0xee, 0x1a, 0x83, 0xec, 0x11, 0x99, 0xec, 0xb0, 0x0e, 0x41, 0x5c,

5. get the guid by ipmi
ipmitool raw 0x06 0x37
9d c2 c4 08 c1 ee 1a 83 ec 11 99 ec b0 0e 41 5c
```

Signed-off-by: Xie Ning <xiening.xll@bytedance.com>
Change-Id: Icc81cb68c08ec019b717519028bd94def968e151
3 files changed