PCE OTN layer support init

-Add PceOtnNode Class and complete PceLinkClass
-Add Algorithm in PceCalculation and PceGraph to handle path
 calculation at the WDM or OTN layer
-Adapt InAlgoPathValidator to work with the OTN layer
-Adapt PostAlgoPathValidator with method to retrieve trib-port/slot in
 place of wavelengths
 CAUTION: at that time, it does not handle trib-slot and trib-port
 pass to Service Handler (still based on old path-computation-request)
-Adapt PCE functional tests
-change topo to include supporting nodes
CAUTION: Expected node in rpc path-computation-request is of OTN type

JIRA: TRNSPRTPCE-162
Signed-off-by: Olivier Renais <olivier.renais@orange.com>
Co-authored-by: Gilles Thouenon <gilles.thouenon@orange.com>
Co-authored-by: Christophe Betoule <christophe.betoule@orange.com>
Change-Id: If5c29cae48b94660f2536f86b2df814b6515969b