Junos get_lldp_neighbor port returns the port-id, not the port-decription

[chadell]

While working with get_lldp_neighbors for junos I noticed that the return value for port was misleading (at least for me), being actually the port-description instead the expected port-id.

I understand this could be a breaking change, so opening this PR to get feedback on this proposed change.

[mirceaulinic]

lldp-remote-port-description needs to stay as that's what older Junos versions provide.

[mirceaulinic]

I left a suggested change, in order to avoid breaking the behaviour for older Junos. I'll also ask you to provide an additional test case (or rename the existing on to something like old_junos and provide a new one containing the <lldp-remote-port-id>27</lldp-remote-port-id> line).

[chadell]

@mirceaulinic , after reviewing the logic, I decided to implement a small change on get_lldp_neighbors, in order to get only the first element of a list, as it's actually how I understand the | operator.
Following your recommendation, I created an old version (without the <lldp-remote-port-id> tag), and kept the normal one, with both tags.

[mirceaulinic]

Thanks @chadell!