(a) Refactored the code to work with the following cases
1. Single node with DVR
2. Single node without DVR
3. Multinode with DVR
4. Multinode without DVR
|-------------|-------------------------------------------------------|
| | Single Node/ Multinode Tests |
| Scenarios |-------------------------------------------------------|
| | DVR | DVR+Concurrency | Non DVR | Non DVR+Concurrency |
|-------------|-----|-----------------|---------|---------------------|
| Vpn Basic | x | x | x | x |
| Multi Tenant| x | x | x | x |
| Vpn Status | x | x | x | x |
|-------------|-----|-----------------|---------|---------------------|
(b) Used the paramiko package to execute commands over ssh.
(c) Moved the README to devref
Depends-On: Id3f199d688d648f4618a6850d094e26ca6bb9a7f
Change-Id: I24d5a8435f06014fa9164bef518cac62bbb70ef9
22205d681e