Change: Revert local folder name back to pre 3.0 behavior

Due to user requests, we reverted the folder name from 
```
ownCloud - Albert@owncloud.com
ownCloud - Katherine@owncloud.org
ownCloud - Marie@owncloud.com
```

back to

 ```
ownCloud
ownCloud (1)
ownCloud (2)
```

https://github.com/owncloud/enterprise/issues/6390
