- Remove eventfd if task has only polling mode
- Created dummy thread to convert eventfd from RT thread to non RT threads
- Added eNB app to softmodem
- Set poll mode for itti dumper thread in softmodem
- Disable timers for softmodem

git-svn-id: http://svn.eurecom.fr/openair4G/trunk@4545 818b1a75-f10b-46b9-bf7c-635c3b92a50f