Enable a user to create and remove optical-intents from CLI

As a user, I would be able to create from the ONOS CLI (manually) optical intents between ROADMS, in order to create packet connectivity between specific switches.

At the same time, as a user I should be able to delete (always from the ONOS CLI) the intents previously created.

Right now the command exists in the CLI, but it doesn't seems to produce any effect. Once intents are installed, typing "intents", the list of the optical intents is visualized and their status is shown as "INSTALLED", but there's no real connectivity between the packet switches.

This is considered a primary feature for the use-case, since it enable users to combine the optical features with any other type of "upper layer" intent (as the ones provided by SDN-IP).