PortChannel ip address is missing after do "systemctl restart teamd".

[habeebmohammed]

Description
PortChannel ip address is missing after do "systemctl restart teamd".

Steps to reproduce the issue:
root@sonic:/home/admin# show ip interfaces
Interface IPv4 address/mask Admin/Oper

---

Ethernet49 11.11.11.1/24 up/up
Ethernet50 12.12.12.1/24 up/down
PortChannel1 34.34.34.1/24 up/up <<== Correct
PortChannel2 56.56.56.1/24 up/up <<== Correct
docker0 240.127.1.1/24 up/down
eth0 10.6.48.133/24 up/up
lo 127.0.0.1/8 up/up
10.1.0.1/32

root@sonic:/home/admin# systemctl restart teamd <<= Do "systemctl restart teamd"

root@sonic:/home/admin# show ip interfaces
Interface IPv4 address/mask Admin/Oper

---

Ethernet49 11.11.11.1/24 up/up
Ethernet50 12.12.12.1/24 up/down
<<=== Issue : PortChannel 1-2 ip address is missing.
docker0 240.127.1.1/24 up/down
eth0 10.6.48.133/24 up/up
lo 127.0.0.1/8 up/up
10.1.0.1/32

Describe the results you received:

Describe the results you expected:
Ip address should be retained after teamd restart. reboot can get the ip addresses back to portchannels

Additional information you deem important (e.g. issue happens only occasionally):

**Output of `show version`:**

```
(paste your output here)
```

**Attach debug file `sudo generate_dump`:**

```
(paste your output here)
```

[stepanblyschak]

Duplicate #3043

[habeebmohammed]

@stepanblyschak , I tried changing the swss.sh per #3114 still IP address is lost with "systemctl restart teamd".

[stepanblyschak]

@habeebmohammed #3114 appeared to be not enough to fix the issue. There is another fix sonic-net/sonic-utilities#582

[habeebmohammed]

@stepanblyschak , I picked #582 changes as well, still no change in the result.

[jleveque]

@habeebmohammed: sonic-net/sonic-utilities#582 fixes a similar issue when calling config reload or config load_minigraph -- it would restart teamd twice. That PR prevents this behavior. It sounds like you are manually reproducing this behavior. I believe that currently SONiC does not support restarting teamd without also restarting SwSS first.

@stcheng: Please confirm.

[yxieca]

Fixed in master and 201811 branch.