Renamed all ITTI functions, to make them start with module name ("itti_").
Added generic signals handling support in ITTI.
Changed ITTI log port for oaisim to 10006.
Introduce an option to use ITTI in oaisim and reoragized code.

git-svn-id: http://svn.eurecom.fr/openair4G/trunk@4267 818b1a75-f10b-46b9-bf7c-635c3b92a50f