Description
A few recent changes introduced an issue with restarting services like nat and mgmt-framework.

The reason is diff decided to specify --net separately, while few services still have this

This causes config reload failure.

Steps to reproduce the issue:

1. Run image with 3856
2. Do config reload
3. Observe Job for nat.service failed because the control process exited with error code

Describe the results you received:

Service restart failure
Log:

Feb  6 14:21:31.314088 mtbc-sonic-01-2410 INFO nat.sh[27859]: Creating new nat container with HWSKU ACS-MSN2410
Feb  6 14:21:31.483881 mtbc-sonic-01-2410 INFO nat.sh[27859]: docker: network "host" is specified multiple times.

Describe the results you expected:

Everything running smooth

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

Originally observed on 201911 release, should also be in master.
Output of show version:

```

SONiC Software Version: SONiC.HEAD.28-d192e0c9
Distribution: Debian 9.11
Kernel: 4.9.0-9-2-amd64
Build commit: d192e0c
Build date: Wed Feb 5 04:39:37 UTC 2020
Built by: johnar@jenkins-worker-8

```

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

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