remove L1L2 task, also remove some call to send messages to UNKNOWN_TASK,...

remove L1L2 task, also remove some call to send messages to UNKNOWN_TASK, removed in new itti. Align LOG in rlc sources with new LOG code (remove DEBUG_RLC...)
13 jobs for <span class="ref-name">issue391-removeunusedcode_L2L1task</span> in 0 seconds (queued for 15 minutes and 12 seconds)
Status Job ID Name Coverage
  External
passed Analysis with cppcheck

00:05:56

passed Build UE-ethernet

00:03:10

passed Build basic-sim

00:00:04

passed Build eNb-USRP

00:00:09

passed Build eNb-USRP-CentOS

00:06:12

passed Build eNb-ethernet

00:00:42

passed Build phy-sim

00:04:39

passed Test basic-sim

00:13:14

passed Test phy-sim

00:11:26

passed Test-FDD-Band7

00:24:37

passed Test-IF4p5-FDD-Band7

00:47:34

passed Test-IF4p5-TDD-Band40

00:34:27

passed Test-TDD-Band40

01:03:48