Description

NAT service pollutes syslog with the following error messages:

ERR nat#supervisor-proc-exit-listener: Unable to retrieve features for container 'nat'. Exiting...

Steps to reproduce the issue:

1. Install SONiC-OS-HEAD.49-055d7cd1 [201911]
2. Deploy t1-lag topo

Describe the results you received:
NAT service pollutes syslog with the error messages and makes a lot of tests fail

Describe the results you expected:
no error message are expected while operating in idle mode

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)
```