Reorganise dependency injection in ServiceHandler

Reorganise dependency injection in ServiceHandler

- solve the ServiceHandler instance duplication issue when installing
  T-API feature
- remove manuel instanciations from ServicehandlerProvider to let
  blueprint manage object instantiation as a singleton
- remove ServiceHandlerOperations interface and its implementation that
  was duplicating OrgOpenroadmServiceService interface, and chose that
  latter in T-API module
- adapt constructors of service handler UT accordingly
- reorganise dependency injection in lighty to be aligned with blueprint
  files

JIRA: TRNSPRTPCE-391
Signed-off-by: Gilles Thouenon <gilles.thouenon@orange.com>
Change-Id: I99d93bef801e24fe9972c277abbcdf5d28f8e781