Align OTN renderer on OTN PCE and update otn-topo

Align OTN renderer on OTN PCE and update otn-topo

- add dependency towards network module to request NetworkModelService
methods
- service-path rpc allows creation/deletion of OCH and OTU4 interfaces
and updates otn-topology with OTU4 links
- otn-service-path rpc allows creation/deletion of ODU4 interfaces,
structured for otn low order service, and creation/deletion of otn low
order services. Moreover, it creates/updates/deletes consequently otn
links and ODU4 termination points in otn-topology (bandwidth
parameters, tributary slot and tributary port availabilities...)
- adapt otn-renderer functional tests to take into account new behavior

JIRA: TRNSPRTPCE-218
Signed-off-by: Gilles Thouenon <gilles.thouenon@orange.com>
Change-Id: I85020faf75fa53be1f965becccdf2787f6c743bb