NBI Notifications as karaf feature

NBI Notifications as karaf feature

- add a new maven module in features maven project
- update lighty with NBI notification:
  - NBI notifications is optional and could be activated through command
    line option -nbinotification
  - restconf file configuration is now passed with -restconf command
    line option
  - add apache common-cli to ease the parsing of command line options

JIRA: TRNSPRTPCE-343
Signed-off-by: manuedelf <emmanuelle.delfour@orange.com>
Change-Id: Ic28aef2705b5cd79277b56467727dedfe9b7b843