Modified eNB appilcation for lte-softmodem.
Changed log conponent to ENB_APP.
Addapted lte-softmodem to wait for eNB - MME registration before starting L2L1 task.
Fixed warnings.

git-svn-id: http://svn.eurecom.fr/openair4G/trunk@4601 818b1a75-f10b-46b9-bf7c-635c3b92a50f