new: usr: Added prefix and suffix capabilities to the optional attributes in the vtysh specification.
new: usr: Added prefix and suffix capabilities to the optional attributes in the vtysh specification.

Change-Id: Ie3f53aba9b3b1a9786da858613b848b56678ccb1
Signed-off-by: Carlos Jenkins <21378b05cb29070c14f580f362fc50e7e7ed8bb4@hpe.com>

carlos-jenkins/ops-topology-lib-vtysh