Changing the object base configuration to enable S3 API

IBM Spectrum Scale™ uses Swift3 Middleware for OpenStack Swift, allowing access to IBM Spectrum Scale using Amazon Simple Storage Service (S3) API.

Perform the following steps if S3 API was not enabled as part of the object base configuration:

To enable S3 API, run the following command:
```
mmobj s3 enable
```
The system enables S3 API.
To verify that S3 API has been enabled, run the following command:
```
mmobj s3 list
```
To disable S3 API, run the following command:
```
mmobj s3 disable
```
The system disables S3 API.
To verify that S3 API has been disabled, run the following command:
```
mmobj s3 list
```