'sonic_py_common.multi_asic' has no attribute 'ROLE'" error message

[SuvarnaMeenakshi]

Description

Error message seen in syslog: "AttributeError: module 'sonic_py_common.multi_asic' has no attribute 'ROLE'" .

Steps to reproduce the issue:

1. Load master or 201911 image with latest snmp docker.
2. Load configuration so that there is a default route via one of the Ethernet interfaces:
   ex:
   show ip route 0.0.0.0/0
   Routing entry for 0.0.0.0/0
   Known via "bgp", distance 20, metric 0, best
   Last update 00:44:06 ago

• 10.0.0.57, via Ethernet0

3. Periodically the error message comes up in the log:
   "AttributeError: module 'sonic_py_common.multi_asic' has no attribute 'ROLE'"

Describe the results you received:
Error message: "AttributeError: module 'sonic_py_common.multi_asic' has no attribute 'ROLE'" |
SNMP walk or get of Route Table (1.3.6.1.2.1.4.24.4) fails

Describe the results you expected:
SNMP walk of 1.3.6.1.2.1.4.24.4 should be successful and error message should not be visible,

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)
```