Fix NFAPI integration

This commit fixes issues introduced by the previous commit.

Summary of work:
- cleanup:
  - fix LOG_XX to be less verbose
  - fix cmake_targets/CMakeLists.txt
  - fix oaienv
  - remove dead code
- bug fixes:
  - in openair1/SCHED/fapi_l1.c we had:
      eNB->pdcch_vars[subframe&1].num_dci           = number_dci;
    should be:
      eNB->pdcch_vars[subframe&1].num_dci           = 0;
    This bug let the PHY send more DCIs than what should have been
    sent because num_dci is incremented later on in the code.
    This fix may be a problem for fapi mode, to be checked.
  - add new T VCD traces
  - revert openair1/PHY/TOOLS/file_output.c to 'develop' version
  - remove thread_id in logRecord/logRecord_mt
  - revert (and adapt) configuration files
  - be careful when doing frame++, we need to % 1024
  - revert target_rx_power in openair2/LAYER2/MAC/eNB_scheduler_ulsch.c
- NFAPI:
  - the open-nFAPI code has been included in the repository. See nfapi/README.
    Maybe we should "git clone" the Cisco repository instead. We have to be
    careful of availability though.

What has been tested:
- monolithic eNB FDD 5/10MHz with one UE, iperf UDP/TCP uplink/downlink

Anything else may fail to work, especially the FAPI mode, which has not
been tested at all.

nfapi/open-nFAPI/configure.ac

@@ -0,0 +1,45 @@
+AC_INIT([open-nFAPI], [1.0])
+
+AC_CONFIG_MACRO_DIR([m4])
+
+AM_INIT_AUTOMAKE([subdir-objects -Wall -Werror foreign serial-tests])
+AM_PROG_AR
+
+LT_INIT([shared static])
+
+# Dependencies
+AC_PROG_CC
+AC_PROG_CXX
+AC_PROG_AWK
+AC_CONFIG_HEADERS([config.h])
+
+AC_PROG_LIBTOOL
+
+AC_CHECK_FILE([/usr/include/CUnit/CUnit.h],
+	[CFLAGS_CUNIT=-I/usr/include/CUnit AC_SUBST(CFLAGS_CUNIT)],
+	[AC_MSG_NOTICE([Have cunit *************])])
+
+# Need doxygen
+AC_CHECK_PROGS([DOXYGEN], [doxygen])
+if test -z "$DOXYGEN";
+	then AC_MSG_WARN([Doxygen not found - continuing without Doxygen support])
+fi
+AM_CONDITIONAL([HAVE_DOXYGEN], [test -n "$DOXYGEN"])AM_COND_IF([HAVE_DOXYGEN], [AC_CONFIG_FILES([docs/Doxyfile])])
+
+AC_REQUIRE_AUX_FILE([tap-driver.sh])
+
+AC_CONFIG_FILES([Makefile
+                 sim_common/Makefile
+                 common/Makefile
+                 nfapi/Makefile
+                 pnf/Makefile
+                 vnf/Makefile
+                 nfapi/tests/Makefile
+                 pnf/tests/Makefile
+                 vnf/tests/Makefile
+                 pnf_sim/Makefile
+                 vnf_sim/Makefile
+                 integration_tests/Makefile
+                 docs/Makefile
+])
+AC_OUTPUT